WIRELESS SIGNAL TRANSCEIVING APPARATUS

• US 20130287071A1
• Filed: 08/15/2012
• Published: 10/31/2013
• Est. Priority Date: 04/26/2012
• Status: Active Grant

• Current Assignee: Microchip Technology Incorporated
• Original Assignee: ISSC Technologies Corporation (Microchip Technology Incorporated)
• Inventors: Chen, Peng-Sen, Chiang, Ming-Chou
• Granted Patent: US 8,582,629 B1
• Time in Patent Office: Days
• US Class Current: 375/219
• CPC Class Codes: H04B 1/006 using switches for selecting the desired band H04B1/0057 takes precedence
• CPC Class Codes: H04L 27/0002 analog front ends; means for connecting modulators, demodulators or transceivers to a transmission line duplex arrangements H04L5/143

Abstract

A wireless signal transceiving apparatus is provided. The wireless signal transceiving apparatus includes a signal transceiving-end circuit, a transceiving amplify module, an output amplify module, a mixer, a frequency selecting filter, switch modules a first base-band signal transceiver and a second base-band signal transceiver. The transceiving amplify module receives and amplifies a signal from an antenna or the mixer. The output amplify module amplifies the signal from the mixer. The frequency selecting filter filters the signal from the mixer, the first base-band signal transceiver or the second base-band signal transceiver according to the mode selecting signal. The first base-band signal transceiver and the second base-band signal transceiver receive the signal generated by the frequency selecting filter and/or respectively transmit the first and the second base-band output signal. The switch modules turn on or turn off transmission paths for the signal according to the mode selecting signal.

Claims

1. A wireless signal transceiving apparatus, comprising:

a signal transceiving-end circuit, coupled to an antenna;

a transceiving amplify module, coupled to the signal transceiving-end circuit, receiving and amplifying a receiving signal transmitted from the antenna, or amplifying and transmitting an output signal to the signal transceiving-end circuit;

an output amplify module, coupled to the transceiving amplify module and the signal transceiving-end circuit, amplifying and transmitting the output signal to the signal transceiving-end circuit;

a mixer, coupled to the transceiving amplify module and the output amplify module, receiving the receiving signal which is amplified and mixing the receiving signal to generate a mixed receiving signal, or mixing a preamble output signal to generate the output signal;

a frequency selecting filter, coupled to the mixer, filtering the mixed receiving signal or filtering one of a first and a second base-band output signal to generate the preamble output signal according to a mode selecting signal;

a first switch module, coupled between the mixer and the frequency selecting filter, transmitting the mixed receiving signal to the frequency selecting filter or transmitting the preamble output signal to the mixer according to the mode selecting signal;

a first and a second base-band signal transceivers, coupled to the frequency selecting filter, wherein the first base-band signal transceiver receives the mixed receiving signal which is filtered and/or transmits the first base-band output signal, the second base-band signal transceiver receives the mixed receiving signal which is filtered and/or transmits the second base-band output signal; and

a second switch module, coupled among the first base-band signal transceiver, the second base-band signal transceiver and the frequency selecting filter, the second switch module turning on a transmitting path for the first base-band output signal, the second base-band output signal and the mixed receiving signal which is filtered according to the mode selecting signal.

2. The wireless signal transceiving apparatus as claimed in claim 1, wherein the signal transceiving-end circuit comprises:

an antenna converter, having a first end, a second end and a third end, wherein the first end is coupled to the antenna;

a first transformer, having a first side and a second side, wherein the first side of the first transformer is coupled to the second end of the antenna converter, the second side of the first transformer is coupled to the transceiving amplify module; and

a second transformer, having a first side and a second side, wherein the first side of the second transformer is coupled to the third end of the antenna converter, the second side of the second transformer is coupled to the output amplify module,

wherein the antenna converter transmits the signal received by the antenna to the second end or the third end of the antenna converter, or the antenna converter transmits the signal received by the second end or the third end to the antenna in order to let the signal radiated by the antenna.

3. The wireless signal transceiving apparatus as claimed in claim 2, wherein the signal transceiving-end circuit further comprises:

a filter, serially connected within a coupling path which the antenna converter coupled to the antenna.

4. The wireless signal transceiving apparatus as claimed in claim 1, wherein the transceiving amplify module comprises:

a first amplifier, wherein an input end of the first amplifier receives the receiving signal, an output end of the first amplifier is coupled to the mixer; and

a second amplifier, wherein an output end of the second amplifier is coupled to the signal transceiving-end circuit, an input end of the second amplifier receives the output signal.

5. The wireless signal transceiving apparatus as claimed in claim 4, wherein the first amplifier is a low noise amplifier (LNA).

6. The wireless signal transceiving apparatus as claimed in claim 4, wherein the mixer comprises:

a first mixer circuit, coupled to the output end of the first amplifier, the first mixer circuit mixes a reference wave signal and the receiving signal which is amplified to generate the mixed receiving signal;

a second mixer circuit, coupled to the input end of the second amplifier, the second mixer circuit mixes the reference wave signal and the preamble output signal to generate the output signal; and

a reference wave generator, coupled to the first and the second mixer circuits, the reference wave generator is provides the reference wave signal.

7. The wireless signal transceiving apparatus as claimed in claim 4, wherein the first switch module comprises:

a first switch, serially connected within a coupling path of the mixer coupling to the frequency selecting filter, transmitting the mixed receiving signal to the frequency selecting filter according to the mode selecting signal; and

a second switch, serially connected within the coupling path of the mixer coupling to the frequency selecting filter, transmitting the preamble output signal to the mixer according to the mode selecting signal,

wherein the first and the second switch can be a turn-on state or a turn-off state, and the states of the first switch and the second switch are different.

8. The wireless signal transceiving apparatus as claimed in claim 1, wherein the second switch module comprises:

a third switch, serially connected between the frequency selecting filter and the first base-band signal transceiver, turning on the transmission path to the first base-band signal transceiver for the mixed receiving signal which is filtered according to the mode selecting signal;

a fourth switch, serially connected between the frequency selecting filter and the first base-band signal transceiver, turning on the transmission path to the frequency selecting filter for the first base-band output signal according to the mode selecting signal; and

a fifth switch, serially connected between the frequency selecting filter and the second base-band signal transceiver, turning on the transmission path to the frequency selecting filter for the second base-band output signal according to the mode selecting signal.

9. The wireless signal transceiving apparatus as claimed in claim 8, wherein at most one of the third switch, the fourth switch and the fifth switch is turned on.

10. The wireless signal transceiving apparatus as claimed in claim 1, wherein the first base-band signal transceiver comprises:

a variable gain amplifier, an input end of the variable gain amplifier is coupled to the second switch module, wherein the variable gain amplifier receives and amplifies the mixed receiving signal which is filtered;

a first analog-to-digital converter, coupled to an output end of the variable gain amplifier, converting an output signal of the variable gain amplifier to a digital format in order to generate a first digital receiving signal;

a first base-band signal processor, coupled to the analog-to-digital converter to receive the first digital receiving signal, wherein the first base-band signal processor generates the first base-band output signal which is digital; and

a first digital-to-analog converter, coupled to the first base-band signal processor and the second switch module, converting the first base-band output signal in digital format to the first base-band output in analog format.

11. The wireless signal transceiving apparatus as claimed in claim 10, wherein the first base-band signal transceiver comprises:

a second analog-to-digital converter, coupled to the output end of the variable gain amplifier, converting the output signal of the variable gain amplifier to digital format in order to generate a second digital receiving signal;

a second base-band signal processor, coupled to the analog-to-digital converter to receive the second digital receiving signal, wherein the second base-band signal processor generates the second base-band output signal which is digital; and

a second digital-to-analog converter, coupled to the second base-band signal processor and the second switch module, converting the second base-band output signal which is in digital format to the second base-band output signal which is in analog format.

12. The wireless signal transceiving apparatus as claimed in claim 1, wherein the first base-band signal transceiver is a Bluetooth base-band signal transceiver, and the second base-band signal transceiver is a wireless LAN base-band signal transceiver.

13. The wireless signal transceiving apparatus as claimed in claim 1, further comprising:

a controller, coupled to the frequency selecting filter and the second switch module to generate the mode selecting signal.