Integrating an FM transmitter into a cellular telephone

Details Integrating an FM transmitter into a cellular telephone Integrating an FM transmitter into a cellular telephone

2011-07-26

2011-07-26

Le, Nhan (Department: 2618)

Telecommunications

Transmitter

Frequency conversion

C455S093000

Reexamination Certificate

active

07986926

ABSTRACT:
A system includes a cellular radio and an FM transmitter that are fabricated in the same semiconductor. The FM transmitter includes at least one mixer, a filter and an antenna tuning network. The mixer(s) translate an intermediate carrier frequency of an input signal to generate a second signal that has an FM carrier frequency. The filter removes spectral energy from the second signal to generate a third signal. The antenna tuning network is separate from the filter and produces a fourth signal to drive an antenna in response to the third signal.

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US Patent Office, International Search Report and Written Opinion for corresponding International Application No. PCT/US2007/020504, 8 pages, Mar. 31, 2008.

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