Logic elements for reactor period meter

Details Logic elements for reactor period meter Logic elements for reactor period meter

1975-03-20

1976-03-02

Borchelt, Archie R.

Radiant energy

Invisible radiant energy responsive electric signalling

Neutron responsive means

250374, G01T 300, G01T 118

Patent

active

039420140

ABSTRACT:
Logic elements are provided for a reactor period meter trip circuit. For one element, first and second inputs are applied to first and second chopper comparators, respectively. The output of each comparator is O if the input applied to it is greater than or equal to a trip level associated with each input and each output is a square wave of frequency f if the input applied to it is less than the associated trip level. The outputs of the comparators are algebraically summed and applied to a bandpass filter tuned to f. For another element, the output of each comparator is applied to a bandpass filter which is tuned to f to give a sine wave of frequency f. The outputs of the filters are multiplied by an analog multiplier whose output is 0 if either input is 0 and a sine wave of frequency 2f if both inputs are a frequency f.

REFERENCES:
patent: 3609734 (1971-09-01), Svansson
patent: 3761712 (1973-09-01), Listerman
patent: 3875410 (1975-04-01), Luger
patent: 3898467 (1975-08-01), Schukei et al.

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