Multiplier for producing phase shift error-free signal represent

Details Multiplier for producing phase shift error-free signal represent Multiplier for producing phase shift error-free signal represent

1975-12-05

1977-03-29

Miller, Jr., Stanley D.

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

235194, 328160, G06G 712

Patent

active

040151409

ABSTRACT:
Metering kWh in an electrical system is accomplished by generating pairs of analog signals, representing current and voltage variables. Each pair of analog signals is multiplied together in a direct pulse-width conversion in a time-division multiplier network. A constant amplitude triangular generator is associated with the multiplier and the multiplier is implemented using C-MOS technology. A separate direct pulse-width multiplier network is provided for multiplying without introducing any phase shift each of the pairs of analog signals to form a series of width and amplitude-modulated pulse signals. The series of modulated pulse signals is converted in, for example, a low-pass filter to a signal having an amplitude representative of average power. For polyphase systems, the signals delivered from each of the multiplier channels are summed at the low-pass filter. An analog-to-pulse rate converter is used for converting the signal representing average power to another series of output pulse signals having a variable signal repetition rate proportional to average power, each output pulse signal representing a quantized amount of electrical energy. A stepping switch and register perform conventional accumulation, storage and display functions in response to the series of output pulse signals delivered thereto.

REFERENCES:
patent: 3558928 (1971-01-01), Remy et al.
patent: 3562553 (1971-02-01), Roth
patent: 3588713 (1971-06-01), Yareck
patent: 3639847 (1972-02-01), Remy et al.
patent: 3712977 (1973-01-01), Rice, Jr.
patent: 3746851 (1973-07-01), Gilbert

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