Integrated quadrature discriminator circuit diagram

The integrated quadrature discriminator diagram is a TV audio integrated circuit, which includes a limiting mid-amplifier (V1, V2; V4, V5; V7, V8 are three-stage differential pair amplifiers, and V3, V6 and V9 are three emitters) Follower), internal voltage regulator (VD1 ~ VD5, V10) and frequency discrimination circuit.

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