Periodicity verification circuit

Details Periodicity verification circuit Periodicity verification circuit

1978-10-19

1981-01-13

Heyman, John S.

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

328127, 328147, 328149, 328109, 328117, 328114, 307358, H03K 904, H03K 906, H03K 5153

Patent

active

042451922

ABSTRACT:
A circuit for high speed testing of the periodicity of an alternating signal (60) independently of signal amplitude. A bistable multivibrator (128) changes state in response to each positive slope zero-crossing of the signal and alternately activates each of a pair of integrators (116, 118, 180 and 117, 114, 181) on alternate cycles of the signal. A pair of high speed gated comparators (112, 115) compares the integrator voltages at the end of each pair of cycles. A reference voltage (130) which increases with the number of cycles is provided to maintain a narrow comparator window as the integrator voltages increase.

REFERENCES:
patent: 3336485 (1967-08-01), Scarpa
patent: 3372234 (1968-03-01), Bowsher et al.
patent: 3404345 (1968-10-01), Marx et al.
patent: 3515997 (1970-06-01), Babany

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