High frequency differential amplification circuit with reduced parasitic capacitance

摘要

Disclosed is a circuit layout of a differential amplification circuit that constitutes a Gilbert cell, in which two multiple finger bipolar transistors forming a differential amplifier are positioned substantially axially symmetrical to each other. The longitudinal direction of each finger is orthogonal to the axis of symmetry. A wiring connected to an emitter electrode of each one of the transistors is laid so as to extend in a direction opposite to the other one of the transistors.