System and method for using a saw based RF transmitter for AM modulated transmission in a TPM
AssigneeLear Corporation
InventorsJohn S. Nantz, Qingfeng Tang, Ronald O. King, Riad Ghabra
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Abstract
For use in a tire pressure monitoring system, an amplitude modulation (AM) radio frequency (RF) oscillator includes a modulator and a generator. The modulator may be configured to generate a modulation signal in response to a data input signal. The generator may be configured to generate an AM output signal having an RF carrier frequency and an envelope, wherein the envelope is amplitude modulated by the modulation signal and the generator includes a frequency determining device.
Claims20
For use in a tire pressure monitoring system, an amplitude modulation (AM) radio frequency (RF) oscillator comprising:
- a modulator configured to generate a modulation signal in response to a data input signal;
- and
- a generator configured to generate an AM output signal having an RF carrier frequency and an envelope, wherein the envelope is amplitude modulated by the modulation signal and the generator comprises a frequency determining device.
For use in a tire pressure monitoring system, a method of generating an amplitude modulation (AM) radio frequency (RF) output signal, the method comprising:
- generating a modulation signal in response to a data input signal;
- generating an AM output signal having a carrier frequency and an envelope;
- and
- amplitude modulating the envelope of the output signal with the modulation signal, wherein the output signal is generated using a generator comprising a frequency determining device.
For use in a remote keyless entry (RKE) system, an amplitude modulation (AM) radio frequency (RF) oscillator comprising:
- a modulator configured to generate a modulation signal in response to a data input signal;
- and
- a generator configured to generate an AM output signal having an RF carrier frequency and an envelope, wherein the envelope is amplitude modulated by the modulation signal and the generator comprises a surface acoustic wave (SAW) device.
Dependencies are inferred from the claim text.