Frequency converter

Details Frequency converter Frequency converter

H - Electricity

03

G

325/105, 350/27

H03G 3/20 (2006.01) H04B 1/16 (2006.01)

Patent

CA 1299248

Abstract: A frequency converter suitable for a multi-channel broadcast signal receiver is provided. The frequency converter includes a pre-amplifier with an AGC control terminal, first and second local oscillators, a first mixer for converting a first-RF frequency of the broadcast signal to a second-RF frequency using a first oscillation signal output from the first local oscillator, a second-RF signal amplifier with an AGC control terminal for amplify- ing the second-RF signal, a second mixer for converting the second-RF frequency of the second-RF signal output from the second-RF signal amplifier to a third-RF frequency using a second local oscillation signal output from the second local oscillator, and an AGC circuit for feeding back to the pre-amplifier and the second-RF signal ampli- fier the AGC signal which is obtained from the third-RF frequency signal as a conversion output from the second mixer for simultaneously controlling the gains of both the pre-amplifier and the second-RF signal amplifier.

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