Electric power conversion systems – Cascaded or combined – diverse conversions in which the... – Current and frequency
Patent
1978-12-08
1980-09-09
Miller, J. D.
Electric power conversion systems
Cascaded or combined, diverse conversions in which the...
Current and frequency
328140, 324 78E, 307261, G01R 2306
Patent
active
042220955
ABSTRACT:
A circuit is disclosed which is responsive to an applied alternating input signal for producing an analog output signal the magnitude of which is made proportional to the frequency of the input signal. A triggering circuit is provided which produces a triggering signal on positive transitions of the input signal. A circuit is included for producing a dual ramp output voltage the peak magnitude of which is varied in accordance with the frequency of the applied input signal. A peak detector circuit samples the dual ramp voltage and holds this value until the next cycle of the input signal wherein the dual ramp voltage is again sampled. The triggering circuit also includes a comparison amplifier for providing control signals the state of which are representative of the respective magnitudes of the dual ramp and peak voltages. These control signals are utilized in conjunction with said triggering signals to vary the peak magnitude of the dual ramp voltage in accordance with variations in the frequency of the input signal.
REFERENCES:
patent: 3569737 (1971-03-01), Bauer
patent: 3575611 (1971-04-01), Reed
patent: 3609395 (1971-09-01), Jania
patent: 3656000 (1972-04-01), Neathery, Jr.
patent: 3796942 (1974-03-01), Bynum
patent: 3992660 (1976-11-01), Kawashima et al.
patent: 4085373 (1978-04-01), McConnell
Bingham Michael D.
Miller J. D.
Motorola Inc.
Wong Peter S.
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