Digital frequency measuring circuitry

Details Digital frequency measuring circuitry Digital frequency measuring circuitry

1976-05-28

1977-09-27

Tokar, M.

Electricity: measuring and testing

Measuring, testing, or sensing electricity, per se

Frequency of cyclic current or voltage

324166, G01R 2302

Patent

active

040514340

ABSTRACT:
Circuitry for developing a binary number proportional to the frequency of an input signal includes a first and second shift register and an adder. Timing control circuitry establishes a 16 bit computation period and also develops a fixed binary number. Circuit means are provided for interconnecting the adder and the firsrt register for increasing the content of the register by the fixed binary number once each cycle of the input signal and for reducing the content of the register by a fixed proportion each of the computation periods occurring during each cycle of the input signal. The content of the first register is transferred to the second or buffer register each cycle of the input signal and display means are provided for displaying the input frequency of a function as the binary number contained in the second register.

REFERENCES:
patent: 3530382 (1970-09-01), Liston et al.
patent: 3928797 (1975-12-01), Kiencke
patent: 3935537 (1976-01-01), Batchelor

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