Circuit for the determination of voltage extrema

Details Circuit for the determination of voltage extrema Circuit for the determination of voltage extrema

1984-02-24

1986-08-05

Tokar, Michael J.

Electricity: measuring and testing

Measuring, testing, or sensing electricity, per se

Analysis of complex waves

324 77B, G01R 2316

Patent

active

046045716

ABSTRACT:
A circuit is provided for the measurement and recognition of maximum or minimum voltages coming for example from a frequency selective measurement objective and in particular from an electronic filter. A fixed measurement frequency is fed to the measurement object. The measurement object is balanced by a stepwise change of a tuning voltage. The output voltage generated by the measurement object is fed to a switch after rectification and amplification, which switch is clocked with a clock signal. The output voltages of the switch are fed to an intermediate storage. The output voltages of the intermediate storage are supplied to a differential amplifier via an intermediate switch actuated by a control clock cycle. If the output voltage reaches an extremum such as a maximum then the stepwise change of the tuning voltage is interrupted. The value determined for the tuning voltage is stored in a memory such as a random access memory, the contents of which represents the optimum for the tuning of the measurement object such as for example the filter.

REFERENCES:
patent: 3427536 (1969-02-01), Wainwright
patent: 3973112 (1976-08-01), Sloane
patent: 4438504 (1984-03-01), Favin

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