DC FEEDBACK AMPLIFIER

摘要: PURPOSE:To provide the new DC feedback circuit in which characteristic such as a high frequency and S/N giving effect onto picture quality is improved with respect to amplifier employed mainly for video camera use signal processing section. CONSTITUTION:In order make bias voltage of an output terminal 6 101 forming differential stable, negative comprising comparator 102, capacitor C1, transistor(TR) Q3 resistor R4 formed. A gain terminals 4-6 changed by selecting resistance resistors R4, R1, R2 best point selected. Furthermore, since formed without increasing capacitance parasitic at collector TR Q2, improved.