Wireless radio modem with minimal interdevice RF interference
First Claim
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1. A wireless radio modem comprising:
- (a) transmission/reception means for transferring data at radio frequencies between a host data processing device and another device; and
(b) modulation/demodulation means for demodulating digital data received from the transmission/reception means and modulating data generated by said host data processing device, the modulation/demodulation means including frequency discrimination means responsive to a received radio signal for retrieving baseband information from the received radio signal, wherein the frequency discrimination means includes one or more electronically-coupled piezoelectric phase-shift devices.
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Abstract
A wireless radio modem for incorporation into a host system includes radio frequency modulation/demodulation circuitry employing electronic device elements that operate in a frequency range that minimize the RF interference between the radio modem and the host system. Radio modem power conservation is further maximized by 1) simplifying signal modulation processing by use of a single sideband suppressed carrier waveform transition table, thereby reducing processing requirements; and 2)incorporating a "sleep mode" feature in which all non-timer circuitry is powered-down when not in use.
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Citations
34 Claims
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1. A wireless radio modem comprising:
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(a) transmission/reception means for transferring data at radio frequencies between a host data processing device and another device; and (b) modulation/demodulation means for demodulating digital data received from the transmission/reception means and modulating data generated by said host data processing device, the modulation/demodulation means including frequency discrimination means responsive to a received radio signal for retrieving baseband information from the received radio signal, wherein the frequency discrimination means includes one or more electronically-coupled piezoelectric phase-shift devices. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method for transferring data at radio frequencies via modem between a host data processing device and another device, the method resulting in minimal electronic interference with the host data processing device and comprising the steps of:
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converting a received radio frequency signal to a high intermediate frequency; and performing data discrimination at the high intermediate frequency, wherein the data discrimination is performed using one or more electronically-coupled piezoelectric phase shift devices. - View Dependent Claims (11, 12, 13, 14, 15, 16)
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17. A FM discriminator comprising:
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(a) means for supplying a frequency modulated signal and (b) frequency discrimination means responsive to the frequency modulated signal for retrieving baseband information from the frequency modulated signal, wherein the frequency discrimination means includes one or more electronically-coupled piezoelectric phase-shift devices. - View Dependent Claims (18, 19, 20, 21)
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22. A wireless radio modem comprising:
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a receiver that receives a radio frequency data signal; and an FM discriminator coupled to the receiver, the FM discriminator having one or more electronically-coupled piezoelectric phase-shift devices, wherein the FM discriminator retrieves baseband information from the received radio frequency data signal. - View Dependent Claims (23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34)
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Specification