Transmitting circuit device and wireless communications device

• US 7,230,996 B2
• Filed: 06/11/2003
• Issued: 06/12/2007
• Est. Priority Date: 06/13/2002
• Status: Active Grant

• Current Assignee: Matsushita Electric Industrial Company Limited (Panasonic Holdings Corporation)
• Original Assignee: Matsushita Electric Industrial Company Limited (Panasonic Holdings Corporation)
• Inventors: Matsuura, Toru, Adachi, Hisashi
• Primary Examiner(s): PHU, PHUONG M
• Application Number:
  US10/459,684
• Publication Number:
  US 20040038648A1
• Time in Patent Office: 1,462 Days
• Field of Search: 375/296, 375/285, 375/259, 375/295, 341/143, 327/551, 455/130
• US Class Current: 375/296
• CPC Class Codes: H04B 14/06 using differential modulation, e.g. delta modulation

Abstract

A transmitting circuit device has a first signal source which outputs a first signal that is a binary or multilevel discrete analog signal or a discrete analog signal with a binary or multilevel envelope and that has signal components and quantization noise components; a second signal source which outputs a second signal composed of the quantization noise components; a first amplifier which amplifies the first signal; and a combiner which cancels out the quantization noise components by combining an output of the first amplifier and the second signal.

Claims

1. A transmitting circuit device, comprising:

a first signal source which outputs a first signal that is a binary or multilevel discrete analog signal or an analog signal with a binary or multilevel discrete envelope and that has signal components and quantization noise components;

a second signal source which outputs a second signal composed of the quantization noise components;

a first amplifier which amplifies the first signal;

a combiner which cancels out the quantization noise components by combining an output of the first amplifier and the second signal;

a signal processor which performs signal processing on incoming third vector data, and thereby outputs (1) first vector data that is a signal whose envelope can take a smaller number of values when vector-modulated than can a signal envelope obtained by vector-modulating the third vector data and (2) second vector data that is a signal obtained by subtracting the third vector data from the first vector data, wherein;

the first signal source is a first vector modulator which vector-modulates the incoming first vector data;

the first signal is an output of the first vector modulator;

the second signal source is a second vector modulator which vector-modulates the incoming second vector data; and

the second signal is an output of the second vector modulator.

2. The transmitting circuit device according to claim 1, wherein a low pass filter is installed between the signal processor and the second vector modulator.

3. The transmitting circuit device according to claim 1, comprising an auxiliary amplifier which amplifies output of the second vector modulator, wherein:

the combiner cancels out the quantization noise components contained in the output of the first amplifier by combining the output of the first amplifier and output of the auxiliary amplifier.

4. The transmitting circuit device according to claim 3, wherein a low pass filter is installed between the signal processor and the second vector modulator or a band pass filter is installed between the second vector modulator and the auxiliary amplifier.

22. A wireless communications device, comprising:

a transmitting circuit which outputs transmit signals; and

a receive circuit which receives receive signals,

wherein the transmitting circuit device according to any of claims 1, 2 to 13 and 19 to 21 is used for the transmitting circuit.

5. A transmitting circuit device, comprising:

a first divider which divides an incoming signal in two;

a delta sigma modulator which delta-sigma modulates a signal from the first output of the first divider;

a second divider which divides a signal from an output of the delta sigma modulator in two;

a main amplifier which amplifies a signal from the first output of the second divider;

a first combiner which combines a signal from the second output of the first divider and a signal from the second output of the second divider; and

a second combiner which combines a signal from an output of the main amplifier and a signal from an output of the first combiner,

wherein the signal at one input and the signal at the other input to the first combiner have been adjusted to be virtually equal in amplitude and opposite in phase, and

the signal at one input and the signal at the other input to the second combiner have been adjusted to be virtually equal in amplitude and opposite in phase.

6. A transmitting circuit device, comprising:

a first divider which divides an incoming signal in two;

a delta sigma modulator which delta-sigma modulates a signal from the first output of the first divider;

a second divider which divides a signal from an output of the delta sigma modulator in two;

a main amplifier which amplifies a signal from the first output of the second divider;

a first vector regulator which adjusts the amplitude and phase of a signal from the second output of the first divider;

a first combiner which combines a signal from an output of the first vector regulator and a signal from the second output of the second divider;

a second vector regulator which adjusts the amplitude and phase of a signal from an output of the first combiner;

an auxiliary amplifier which amplifies a signal from an output of the second vector regulator;

a second combiner which combines a signal from the output of the main amplifier and a signal from the output of the auxiliary amplifier,

wherein the signal at one input and the signal at the other input to the first combiner have been adjusted to be virtually equal in amplitude and opposite in phase, and

the signal at one input and the signal at the other input to the second combiner have been adjusted to be virtually equal in amplitude and opposite in phase.

7. The transmitting circuit device according to claim 6, wherein a band pass filter is installed between the first combiner and the second vector regulator or between the second vector regulator and the auxiliary amplifier.

8. The transmitting circuit device according to claim 6, wherein a digital signal is input in all or some of the first divider, the delta sigma modulator, the second divider, the first vector regulator, the second combiner, and the second vector regulator.

9. A transmitting circuit device, comprising:

a first divider which divides amplitude modulation data received from a data generator which generates the amplitude modulation data and angle modulation data, in two;

a delta sigma modulator which delta-sigma modulates a signal from the first output of the first divider;

a second divider which divides a signal from an output of the delta sigma modulator in two;

a first vector regulator which adjusts the amplitude and phase of a signal from the second output of the first divider;

a first combiner which combines a signal from the first output of the second divider and a signal from an output of the first vector regulator;

an angle modulator which angle-modulates the angle modulation data received;

a third divider which divides a signal from an output of the angle modulator in two;

a first multiplier which multiplies a signal from the second output of the second divider and a signal from the first output of the third divider;

a second multiplier which multiplies a signal from the first output of the first combiner and a signal from the second output of the third divider;

a second vector regulator which adjusts the amplitude and phase of a signal from the first output of the second multiplier; and

a second combiner which combines a signal from an output of the first multiplier and a signal from an output of the second vector regulator,

wherein the signal at one input and the signal at the other input to the first combiner have been adjusted to be virtually equal in amplitude and opposite in phase, and

the signal at one input and the signal at the other input to the second combiner have been adjusted to be virtually equal in amplitude and opposite in phase.

10. The transmitting circuit device according to claim 9, wherein a low pass filter is connected between the first combiner and the second multiplier.

15. The transmitting circuit device according to any of claims 9 to 13, wherein amplitude modulation data is a digitalized data.

17. The transmitting circuit device according to any of claims 6 to 14, wherein a bandpass filter is installed in a stage upstream or downstream of the second combiner.

18. The transmitting circuit device according to claim 17, wherein the bandpass filter varies its pass band with the transmit frequency.

11. A transmitting circuit device, comprising:

a first divider which divides in two amplitude modulation data received from a data generator which generates the amplitude modulation data and angle modulation data;

a delta sigma modulator which delta-sigma modulates a signal from the first output of the first divider;

an angle modulator which angle-modulates the angle modulation data received;

a second divider which divides in two a signal from an output of the angle modulator;

a first multiplier which multiplies a signal from the first output of the second divider and a signal from an output of the delta sigma modulator;

a third divider which divides in two a signal from an output of the first multiplier;

a second multiplier which multiplies a signal from the second output of the second divider and a signal from the second output of the first divider;

a first vector regulator which adjusts the amplitude and phase of a signal from an output of the second multiplier;

a first combiner which combines a signal from the first output of the third divider and a signal from an output of the first vector regulator;

a second vector regulator which adjusts the amplitude and phase of a signal from an output of the first combiner;

an auxiliary amplifier which amplifies a signal from an output of the second vector modulator; and

a second combiner which combines a signal from the second output of third divider and a signal from an output of the auxiliary amplifier,

wherein the signal at one input and the signal at the other input to the first combiner have been adjusted to be virtually equal in amplitude and opposite in phase, and

the signal at one input and the signal at the other input to the second combiner have been adjusted to be virtually equal in amplitude and opposite in phase.

12. The transmitting circuit device according to claim 11, wherein a band pass filter is installed between the first combiner and the second vector regulator or between the second vector regulator and the auxiliary amplifier.

16. The transmitting circuit device according to any of claims 6, 11, or 13, wherein an auxiliary amplifier is connected to at least one of the vector regulators and a predistortion circuit is installed in a stage preceding the auxiliary amplifier.

13. A transmitting circuit device, comprising:

a delta sigma modulator which delta-sigma modulates amplitude modulation data received from a data generator which generates the amplitude modulation data and angle modulation data;

an angle modulator which angle-modulates the angle modulation data received;

a multiplier which multiplies a signal from an output of the delta sigma modulator and a signal from an output of the angle modulator;

a divider which divides an output of the multiplier;

a vector modulator which modulates an incoming vector signal;

a first vector regulator which adjusts the amplitude and phase of a signal from an output of the vector modulator;

a first combiner which combines a signal from a first output of the divider and a signal from an output of the first vector regulator;

a second vector regulator which is connected to output of the first combiner; and

a second combiner which combines a signal from a second output of the divider and a signal from an output of the second vector regulator,

wherein the signal at one input and the signal at the other input to the first combiner have been adjusted to be virtually equal in amplitude and opposite in phase, and

the signal at one input and the signal at the other input to the second combiner have been adjusted to be virtually equal in amplitude and opposite in phase.

14. The transmitting circuit device according to claim 13, comprising an auxiliary amplifier which amplifies a signal from an output of the second vector regulator and outputs it to the second combiner,

wherein a band pass filter is installed between the first combiner and the second vector regulator or between the second vector regulator and the auxiliary amplifier.

19. A transmitting circuit device, comprising:

a delta sigma modulator which delta-sigma modulates an incoming I signal;

a first divider which divides a signal from an output of the delta sigma modulator in two;

a first vector regulator which adjusts the amplitude and phase of the incoming I signal;

a first combiner which combines a signal from the first output of the first divider and a signal from an output of the a first vector regulator;

a signal generator which generates a local oscillator signal;

a phase shifter which phase-shifts an output signal of the signal generator;

a first multiplier which multiplies a signal from an output of the first combiner and an output signal from the phase shifter;

a second vector regulator which adjusts the amplitude and phase of a signal from an output of the first multiplier;

a second multiplier which multiplies a signal from the second output of the first divider and the output signal from the phase shifter;

a second combiner which combines a signal from an output of the second vector regulator and a signal from an output of the second multiplier;

a delta sigma modulator which delta-sigma modulates an incoming Q signal;

a second divider which divides a signal from an output of the delta sigma modulator in two;

a third vector regulator which adjusts the amplitude and phase of the incoming Q signal;

a third combiner which combines a signal from the first output of the second divider and a signal from an output of the third vector regulator;

a third multiplier which multiplies a signal from an output of the third combiner and a signal from an output of the phase shifter;

a fourth vector regulator which adjusts the amplitude and phase of a signal from an output of the third multiplier;

a fourth multiplier which multiplies a signal from the second output of the second divider and the output signal from the phase shifter;

a fourth combiner which combines a signal from the first output of the fourth vector regulator and a signal from an output of the fourth multiplier; and

a fifth combiner which combines a signal from an output of the second combiner and a signal from an output of the fourth combiner;

wherein the signal at one input and the signal at the other input to the first combiner have been adjusted to be virtually equal in amplitude and opposite in phase,

the signal at one input and the signal at the other input to the second combiner have been adjusted to be virtually equal in amplitude and opposite in phase,

the signal at one input and the signal at the other input to the third combiner have been adjusted to be virtually equal in amplitude and opposite in phase, and

the signal at one input and the signal at the other input to the fourth combiner have been adjusted to be virtually equal in amplitude and opposite in phase.

20. The transmitting circuit device according to claim 19, wherein:

a low pass filter is connected between the first combiner and the first multiplier; and

a low pass filter is connected between the third combiner and the third multiplier.

21. The transmitting circuit device according to claim 19, wherein a bandpass filter is connected in at least one or more places from among a stage upstream or downstream of the second combiner, a stage upstream or downstream of the fourth combiner, and a stage upstream or downstream of the fifth combiner.