Power supply circuit capable of reducing the number of...

Details Power supply circuit capable of reducing the number of... Power supply circuit capable of reducing the number of...

2007-04-09

2009-12-01

Nguyen, Matthew V (Department: 2838)

Electricity: power supply or regulation systems

Output level responsive

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

Reexamination Certificate

active

07626366

ABSTRACT:
An inverting negative voltage DC-DC power supply circuit comprises a first resistor having one end connected to an output terminal for converting a change in output voltage into a current. A zero-volt clamp circuit is connected to the other end of the first resistor and comprises a first and second transistor. A current mirror circuit comprises a third and fourth transistor and is connected to the zero-volt clamp circuit for causing a current of the same value as that of a current flowing in the zero-volt clamp circuit to flow. A second resistor is connected to the current mirror circuit for converting a change in current flowing from the zero-volt clamp circuit into a voltage.

REFERENCES:
patent: 4349778 (1982-09-01), Davis
patent: 5023542 (1991-06-01), Banura
patent: 5335263 (1994-08-01), Tsunehiro et al.
patent: 7378827 (2008-05-01), Stoichita
HA16114 Datasheet (RJJ03F0050-0300Z), publised by Renesas Technology, Rev. 2.0, Sep. 18, 2003, 37-2 in p. 9, Fig. 2.2 Output Voltage Setting (2) in Negative Output Voltage (Vo<0).

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