A television receiver having an electronically controlled tuner is presented. A controlled local oscillator provides a local oscillator signal for the mixer. The controlled local oscillator includes an first input terminal for receiving a control signal for controlling its frequency and a first output...http://www.google.es/patents/US5535443?utm_source=gb-gplus-sharePatente US5535443 - Negative feedback control circuit having a common line for input and output signal
Negative feedback control circuit having a common line for input and output ...
