Doubling mixer

Details Doubling mixer Doubling mixer

H - Electricity

04

B

325/116

H04B 1/26 (2006.01) H03D 7/02 (2006.01)

Patent

CA 1075774

RD-7859 ABSTRACT OF THE DISCLOSURE A mixer is provided for frequency conversion of radio frequency signals. The mixture requires a local ascillator frequency which is one half the frequency required for prior art mixers. In the mixer, an input signal is combined with a local oscillator signal to produce two output signals. One output signal has a frequency equal to the sum of the input signal frequency and twice the local oscillator signal frequency. The other output signal has a frequency equal to the difference between the input signal frequency and twice the local oscillator signal frequency. The other output signal has a frequency equal to the difference between the input signal frequency and twice the local oscillator signal frequency. An input tuned circuit 18 tuned to the frequency of the input signal, and an output tuned circuit is tuned to the frequency of a desired one of the two output signals. A semiconductor diode switching circuit is provided between the input tuned circuit and the output tuned circuit. The diode switching circuit responds to the local oscillator signal alternately connecting and disconnecting the two tuned circuits twice during each cycle of the local oscillator signal.

255055

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