Transmitter

Details Transmitter Transmitter

H - Electricity

04

B

H04B 1/04 (2006.01) H03D 7/16 (2006.01) H03J 3/28 (2006.01) H03B 21/02 (2006.01) H03J 1/00 (2006.01)

Patent

CA 2048148

A transmitter using a dual conversion system which effects frequency conversion twice has a local oscillator for generating a first local oscillation signal, a multiplier for multiplying the frequency of the first local oscillation signal to produce a second local oscillation signal, a first mixer for mixing the first local oscillation signal and first IF signal to produce a second IF signal, and a second mixer for mixing the second local oscillation signal and second IF signal to produce a signal to be transmitted. A voltage controlled filter whose center frequency varies with the frequency of the first local oscillation signal is connected to the output of the first mixer.

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