Switching power source, switching power source control...

Details Switching power source, switching power source control... Switching power source, switching power source control...

2007-02-27

2007-02-27

Laxton, Gary L (Department: 2838)

Electricity: power supply or regulation systems

Output level responsive

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

C323S283000, C323S284000, C323S351000

Reexamination Certificate

active

11276094

ABSTRACT:
There is provided a switching power source capable of quickly responding to a change in output at high efficiency over a wide output voltage range. The power source includes an integrator, a comparator which compares an output from the integrator with a quantization reference value, and a sampling circuit which samples an output from the comparator in synchronism with a clock signal. The power source further includes a ΔΣ modulator which quantizes an output from the integrator, outputs a quantized signal, and negative-feeds back the quantized signal to suppress the quantization error of the input signal. In the switching power source, a resistance value adjustment circuit changes the hysteresis width of the quantization reference value by changing the resistance value of the variable resistor of the comparator on the basis of a signal output from a detection circuit which detects at least one of an external control signal and the output voltage and load current of the switching power source.

REFERENCES:
patent: 5677618 (1997-10-01), Fiez et al.
patent: 6137275 (2000-10-01), Ravon
patent: 6784648 (2004-08-01), Mitamura et al.
patent: 2002-64383 (2002-02-01), None
patent: 2002-300772 (2002-10-01), None
“About Characteristic of DC—DC Converter Controlled by Delta-Sigma Modulation”, Yasuhide Imamura, et al., Technical Report Of IEICE. EE2002-78, pp. 89-94 (Feb. 2003).

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