Power source circuit and electronic device with the same

Details Power source circuit and electronic device with the same Power source circuit and electronic device with the same

1995-08-28

2000-07-11

Riley, Shawn

Electricity: power supply or regulation systems

Output level responsive

Using a three or more terminal semiconductive device as the...

323285, G05F 140

Patent

active

060878142

ABSTRACT:
A power source circuit of the switching stabilizing power source type, which is adaptable for portable television sets, video tape recorders, telephone sets, and the like. In the power source circuit, the oscillating operation of an oscillator circuit is synchronized with a reference clock signal of an external circuit. Because of this, the beat noise that is due to the fact that the noise unremovable by smoothing circuits is not synchronized with the reference clock signal can be removed. As a result, no deterioration of the external circuit characteristics, no erroneous operation of the power source circuit, and improvement of the reliability of the power source circuit are ensured. Further, since the oscillator circuit generates a triangle wave voltage, the triangle wave voltage contains a less noise by harmonic components than that of a saw-tooth wave voltage.

REFERENCES:
patent: 4812959 (1989-03-01), Driscoll et al.

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