Phase comparison circuit

Details Phase comparison circuit Phase comparison circuit

1990-08-10

1991-08-13

Miller, Stanley D.

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

307516, 307529, 328133, H03K 526, H03L 700

Patent

active

050398890

ABSTRACT:
A phase comparison circuit includes a double balanced mixer stage which receives a sine signal as well as this sine signal in anti-phase and a square-wave switching signal of the same nominal frequency, two active current mirror circuits are used which incorporate at least two common negative feedback circuit elements, the first of which is operative in the input-sided negative feedback of the first current mirror circuit and in the output-sided negative feedback of the second current mirror circuit and the second of which is operative in the reverse way. The two current mirror circuits are alternately connected to the two balanced mixer stages by means of a switching stage during the half cycle clock of the switching signal.

REFERENCES:
patent: 3875522 (1975-04-01), Hoeji
patent: 3946330 (1976-03-01), Takahashi
patent: 3970868 (1976-07-01), Clements et al.
patent: 4256980 (1981-03-01), Asada et al.
patent: 4614911 (1986-09-01), Kawano
patent: 4629914 (1986-12-01), Okanobu
patent: 4801827 (1989-01-01), Metz
patent: 4808856 (1989-02-01), Tanigawa
patent: 4870303 (1989-09-01), McGinn

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