Radio integrated circuit with integrated power amplifier
First Claim
1. A radio frequency integrated circuit comprising:
- an input receiver to receive a serial digital transmission bit stream from a digital signal processing integrated circuit;
a data recoverer coupled to the input receiver, the data recoverer to recover digital data bits from the serial digital transmission bit stream;
a low pass filter coupled to the data recoverer, the low pass filter to convert the digital data bits into an analog transmission signal;
a mixer coupled to the low pass filter, the mixer to up-convert the analog transmission signal from a baseband frequency to a second selectable carrier frequency as a transmit radio frequency signal; and
a first power amplifier coupled to the mixer and selectively coupled to an antenna, the first power amplifier to amplify the transmit radio frequency signal for broadcast over the antenna.
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Accused Products
Abstract
A radio system includes a radio frequency (RF) integrated circuit (IC), a baseband digital signal processing (DSP) IC, and a serial digital interface coupling data there-between. In one embodiment of the invention, the RF IC has an input receiver to receive a serial digital transmission bit stream from a digital signal processing integrated circuit; a data recoverer coupled to the input receiver to recover digital data bits from the serial digital transmission bit stream; a low pass filter coupled to the data recoverer convert the digital data bits into an analog transmission signal; a mixer coupled to the low pass filter to up-convert the analog transmission signal from a baseband frequency to a second selectable carrier frequency as a transmit radio frequency signal; and an amplifier coupled to the mixer and an antenna, the amplifier to amplify the transmit radio frequency signal for broadcast over the antenna.
60 Citations
42 Claims
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1. A radio frequency integrated circuit comprising:
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an input receiver to receive a serial digital transmission bit stream from a digital signal processing integrated circuit;
a data recoverer coupled to the input receiver, the data recoverer to recover digital data bits from the serial digital transmission bit stream;
a low pass filter coupled to the data recoverer, the low pass filter to convert the digital data bits into an analog transmission signal;
a mixer coupled to the low pass filter, the mixer to up-convert the analog transmission signal from a baseband frequency to a second selectable carrier frequency as a transmit radio frequency signal; and
a first power amplifier coupled to the mixer and selectively coupled to an antenna, the first power amplifier to amplify the transmit radio frequency signal for broadcast over the antenna. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A radio frequency integrated circuit comprising:
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an input receiver having a differential input to receive a differential serial transmit signal, the input receiver having a serial digital output;
a data recoverer having an input coupled to the serial digital output of the input receiver, the data recoverer having a serial digital output;
a low pass filter having an input coupled to the serial digital output of the data recoverer, the low pass filter having an analog output;
a mixer having an input coupled to the analog output of the low pass filter, the mixer having an analog output; and
a first power amplifier having an input coupled to the analog output of the mixer, the first power amplifier having a first output to selectively couple to the antenna. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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15. A radio frequency integrated circuit comprising:
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at least one gain amplifier to couple to an antenna to receive a first wireless radio frequency signal of a first selectable carrier frequency;
at least one down converter coupled to the at least one gain amplifier, the at least one down converter to extract a first analog signal from the first wireless radio frequency signal;
at least one single bit sigma delta modulator coupled to the at least one down converter, the at least one single bit sigma delta modulator to convert the first analog signal into a first serial digital bit stream;
at least one output driver coupled to the at least one single bit sigma delta modulator, the at least one output driver to provide a low voltage output swing of the first serial digital bit stream to reduce noise generation as the first serial digital bit stream is coupled to another integrated circuit;
an input receiver to receive a second serial digital bit stream to be transmitted;
a data recoverer coupled to the input receiver, the data recoverer to recover digital data bits from the second serial digital bit stream;
a low pass filter coupled to the data recoverer, the low pass filter to convert the digital data bits into a second analog signal;
a mixer coupled to the low pass filter, the mixer to up-convert the second analog signal from a baseband frequency to a second selectable carrier frequency as a second wireless radio frequency signal; and
an amplifier coupled to the mixer, the amplifier to amplify the second wireless radio frequency signal for broadcast over the antenna. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22)
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23. A system comprising:
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a digital signal processing integrated circuit including a sigma-delta modulator having a parralel digital input and a serial digital output, the sigma-delta modulator to receive a parallel digital transmit signal and generate a serial transmit signal, an output driver having a digital input coupled to the serial digital output of the sigma-delta modulator to receive the serial transmit signal, the output driver further having a differential output, the output driver to generate a differential serial transmit signal on the differential output in response to the serial transmit signal; and
a radio frequency integrated circuit coupled to the digital signal processing integrated circuit, the radio frequency integrated circuit including an input receiver having a differential input coupled to the differential output of the output driver, the input receiver to receive the differential serial transmit signal, the input receiver having a serial digital output;
a data recoverer having an input coupled to the serial digital output of the input receiver, the data recoverer having a serial digital output;
a low pass filter having an input coupled to the serial digital output of the data recoverer, the low pass filter having an analog output;
a mixer having an input coupled to the analog output of the low pass filter, the mixer having an analog output; and
a first power amplifier having an input coupled to the analog output of the mixer, the first power amplifier having a first output to selectively couple to an antenna. - View Dependent Claims (24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39)
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40. A method for a radio frequency communication system, the method comprising:
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providing a serial digital interface between a radio frequency integrated circuit and a digital signal processing integrated circuit;
providing a sigma-delta modulator in the radio frequency integrated circuit;
integrating one or more power amplifiers into the radio frequency integrated circuit; and
selectively coupling the one or more power amplifiers to one or more antennae. - View Dependent Claims (41, 42)
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Specification