Electricity: power supply or regulation systems – Self-regulating – Using a three or more terminal semiconductive device as the...
Patent
1997-08-27
1998-11-17
Wong, Peter S.
Electricity: power supply or regulation systems
Self-regulating
Using a three or more terminal semiconductive device as the...
327 55, 330257, G05F 300
Patent
active
058381490
ABSTRACT:
The invention relates to a voltage control means provided with a first and a second transistor T1 and T2 constituting a differential pair, the base of the first transistor T1 being intended to receive a reference voltage Vref, the base of the second transistor T2 being intended to receive a predetermined fraction Vs of a voltage applied to a power supply terminal VDD, and also provided with a first current mirror M1 and a second current mirror M2, each having its input connected to the collector of one of the transistors and its output connected to the collector of the other transistor, the output current of each mirror being K times larger than the input current. According to the invention, a resistor R is inserted in the connection between the emitters of the first and second transistors T1 and T2, and the voltage control means is provided with injection means for injecting into the collector of each transistor a current equal to Q times its own bias current, in which Q is a predetermined real number, and signalization means allowing supply of a current Iout at an output terminal, which current is proportional to the input current of one of the current mirrors M1 and M2.
REFERENCES:
patent: 4442400 (1984-04-01), Nagano
patent: 5357188 (1994-10-01), Takeda et al.
patent: 5521544 (1996-05-01), Hatanaka
"201 Analog Designs", p. 25, paragraph 64, published by the Interdesign Society, no date.
Han Y. J.
U.S. Philips Corporation
Wong Peter S.
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