Electricity: power supply or regulation systems – Input level responsive – Using a linearly acting final control device
Patent
1981-04-14
1983-01-11
Pellinen, A. D.
Electricity: power supply or regulation systems
Input level responsive
Using a linearly acting final control device
323267, 323281, 323313, 323901, 323907, G05F 158, G05F 320
Patent
active
043684203
ABSTRACT:
A temperature-compensated reference voltage circuit includes a transistor having a positive temperature coefficient of current. A circuit for establishing a predetermined current in the positive-temperature-coefficient-of-current transistor is connected to that transistor. A predetermined resistance serially connects the positive-temperature-coefficient-of-current transistor with a transistor having negative temperature coefficient of base-to-emitter voltage. The temperature-compensated reference voltage is established between the transistors. The temperature-compensated reference voltage circuit is particularly useful in a supply voltage sense amplifier circuit for thermal printhead drive transistors or other load elements. The sense amplifier circuit includes a circuit for comparing the reference voltage and a supply voltage. An output is adapted to be connected to a load for receiving the supply voltage. A circuit is connected to receive an input from the comparing circuit, and to said output, for enabling the output when the supply voltage is equal or greater than the reference voltage.
REFERENCES:
patent: 3908162 (1975-09-01), Marley et al.
patent: 4079308 (1978-03-01), Brown
patent: 4095164 (1978-06-01), Ahmed
patent: 4100437 (1978-07-01), Hoff
patent: 4274061 (1981-06-01), Kraemer
patent: 4277739 (1981-07-01), Priel
Chin et al., "On-Chip Reference Voltage Generator", IBM Technical Disclosure Bulletin, vol. 20, No. 7, Dec. 1977, pp. 2709, 2710.
Gersbach, "Slope Sensitive Voltage Source", IBM Technical Disclosure Bulletin, vol. 19, No. 2, Jul. 1976, p. 415.
Becker Warren M.
Fairchild Camera and Instrument Corp.
Olsen Kenneth
Park T. S.
Pellinen A. D.
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