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Apparatus for processing the output voltage of a detection circuit

Image Number 2 for United States Patent #4247867.

The apparatus comprises a phase detection circuit for detecting the phase difference between two input signals to produce a single output which is supplied to charge a capacitor through a gate circuit and a unidirectionally conductive element. The terminal voltage of the capacitor is applied to one control terminal of a differential load circuit. The other control terminal of the load circuit is connected to receive the voltage produced by a bias circuit similar to the gate circuit.

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