Signal generator

Details Signal generator Signal generator

1988-12-15

1990-02-13

Heyman, John S.

Electricity: measuring and testing

Measuring, testing, or sensing electricity, per se

Frequency of cyclic current or voltage

324 83R, 328 63, 328 72, H03K 513, H03K 700, H03K 1700

Patent

active

049010271

ABSTRACT:
In a phase accumulation type signal generatorm when an adder of a phase accumulator yields a carry output, a difference circuit generates an analog voltage V.sub.1 =a.sub.2 (n-k.sub.s) which is in proportion to the difference between the output k.sub.s of the adder and a phase add amount n. A ramp function voltage generator generates a ramp function voltage V(t)=nfa.sub.1 a.sub.3 t/cm which is in proportion to the product of the frequency f/m of a clock and the phase add amount n. The analog voltage and the ramp function voltage are compared by a comparator, which outputs a synchronization pulse when they agree with each other.

REFERENCES:
patent: 4468796 (1984-08-01), Suga
patent: 4680621 (1987-07-01), Baker et al.
patent: 4700129 (1987-10-01), Yoshizawa et al.
patent: 4771193 (1988-09-01), Ohta
patent: 4835481 (1989-05-01), Geissler et al.

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