Radio transceiver on a chip
An entire radio transceiver can be completely integrated into one IC chip. In order to integrate the IF filters on the chip, a heterodyne architecture with a low IF is used. A single, directly modulated VCO is used for both up-conversion during transmission, and down-conversion during reception. Bond-wires are used as resonators in the oscillator tank for the VCO. A TDD scheme is used in the air interface to eliminate cross-talk or leakage. A Gaussian-shaped binary FSK modulation scheme is used to provide a number of other implementation advantages.
1. A radio for transmitting and receiving, via an antenna, a plurality of high-frequency signals in a time-division-duplex mode on a single IC chip, the radio comprising:
a circuit path adapted to connect the antenna to a data output port and to a data input port, wherein the circuit path comprises:
(1) a down-conversion section for down-converting received high-frequency signals of the plurality of high-frequency signals;
(2) a bandpass filter for filtering signals derived from the received high-frequency signals;
(3) a detector for detecting a received data signal from a received filtered signal, wherein the received data signal is sent to the data output port; and
(4) an up conversion section for up converting an information signal received from the data input port to a high-frequency signal of the plurality of high-frequency signals;
wherein the circuit path comprising the bandpass filter, the detector, the up conversion section, and the down-conversion section is integrated into the single IC chip;
wherein bandpass filtering operations are performed by components integrated into the single IC chip; and
automatic re-transmission request error correction means for data transfer.
2. The radio of claim 1 , wherein the up conversion section comprises a variable controlled oscillator.
3. The radio of claim 1 , wherein the up conversion section comprises a directly modulated variable controlled oscillator.
4. The radio of claim 1 , wherein the radio comprises an image-rejection-mixer stage.
5. The radio of claim 1 , further comprising autotuning means for autotuning a plurality of filters and the detector.
6. The radio of claim 1 , further comprising a digital power-down control circuit to provide power-down control for the radio, wherein the power-down control circuit is integrated into the single IC chip.
7. The radio of claim 1 , further comprising a low-power oscillator integrated into the single IC chip.
8. The radio of claim 1 , wherein the signals derived from the received high-frequency signals of the plurality of high-frequency signals are low intermediate frequency signals.
9. The radio of claim 1 , wherein the circuit path further comprises a low-pass filter for filtering the received data signal output by the detector and the low-pass filter is connected to the detector and the data output port.
10. The radio of claim 1 , further comprising the antenna.
11. A radio for transmitting and receiving, via an antenna, a plurality of high-frequency signals in a time-division-duplex mode on a single IC chip, the radio comprising:
a circuit path adapted to connect the antenna to a data output port and to a data input port, wherein the circuit path comprises:
(1) a bandpass filter for filtering signals derived from the received high-frequency signals;
(2) a detector for detecting a received data signal from a received filtered signal, wherein the received data signal is sent to the data output port; and
(3) an up conversion section for up converting an information signal received from the data input port to a high-frequency signal of the plurality of high-frequency signals;
(4) a shaping filter connected to an input of the up-conversion section;
wherein the circuit path comprising the bandpass filter, the detector, the up conversion section, and the shaping filter is integrated into the single IC chip; and
wherein bandpass filtering operations are performed by components integrated into the single IC chip; and
automatic re-transmission request error correction means for data transfer.
12. The radio of claim 11 , wherein the up conversion section comprises a variable controlled oscillator.
13. The radio of claim 11 , wherein the up conversion section comprises a directly modulated variable controlled oscillator.
14. The radio of claim 11 , wherein the radio comprises an image-rejection-mixer stage.
15. The radio of claim 11 , further comprising autotuning means for autotuning a plurality of filters and the detector.
16. The radio of claim 11 , further comprising a digital power-down control circuit to provide power-down control for the radio, wherein the power-down control circuit is integrated into the single IC chip.
17. The radio of claim 11 , further comprising a low-power oscillator integrated into the single IC chip.
18. The radio of claim 11 , wherein the signals derived from the received high-frequency signals of the plurality of high-frequency signals are low intermediate frequency signals.
19. The radio of claim 11 , wherein the circuit path further comprises a low-pass filter for filtering the received data signal output by the detector and the low-pass filter is connected to the detector and the data output port.
20. The radio of claim 11 , further comprising the antenna.