Automatic if tangent lock control circuit

Details Automatic if tangent lock control circuit Automatic if tangent lock control circuit

H - Electricity

03

L

325/106

H03L 7/06 (2006.01) H03D 1/22 (2006.01) H03J 7/10 (2006.01)

Patent

CA 1296776

CR-00135S AUTOMATIC IF TANGENT LOCK CONTROL CIRCUIT Abstract of the Disclosure An improved radio receiver that maintains a stable predetermined IF frequency upon receipt of input carrier signals of differing frequencies. The IF signal (14) is processed through a signal demodulation unit (16) that includes a tangent processing unit (22) to yield a control signal that varies as a tangent function of both the demodulated IF signal and a reference signal from a reference oscillator (17). This control signal is used to control the frequency and phase of a reference signal (26) used by the IF stage (12) to center the IF signal with respect to the IF stage characteristics.

557148

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