Electricity: measuring and testing – Measuring – testing – or sensing electricity – per se – Plural inputs
Patent
1974-05-08
1976-03-02
Krawczewicz, Stanley T.
Electricity: measuring and testing
Measuring, testing, or sensing electricity, per se
Plural inputs
307271, G01R 700, G01R 1132
Patent
active
039421104
ABSTRACT:
A bipolar C-MOS analog to pulse rate converter is disclosed which provides a pulse train at its output having a frequency which is proportional to the magnitude of an analog input signal over a wide dynamic range. An analog input signal is integrated until the output of the integrator reaches a threshold level. A threshold detector generates a signal when the threshold level is reached which signal is coupled to a JK flip-flop. The JK flip-flop changes its state to thereby provide an output pulse and at the same time provide a switching pulse for coupling a DC reference source to the input of the integrator for resetting the integrator to a reference level. The flip-flop is then reset and the integrator again integrates the analog input signal to initiate a second cycle. Since the output frequency of the converter is dependent upon the time required for the output of the integrator to reach the threshold level, the output frequency is directly proportional to the magnitude of the input signal to the converter.
REFERENCES:
patent: 3500200 (1970-03-01), Woodhead
patent: 3510772 (1970-05-01), Luthi
patent: 3525042 (1970-08-01), Nunlist et al.
patent: 3794917 (1974-02-01), Martin et al.
patent: 3818340 (1974-06-01), Yamaguchi
Friedl et al., Portable Electronic Watthourmeter-Standard Published Versions of Lectures Given During the Sept. 1972 IEE Metering Conference in London England, Paper No. 117.
General Electric Company
Krawczewicz Stanley T.
Myles Vale P.
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