Electricity: power supply or regulation systems – Self-regulating – Using a three or more terminal semiconductive device as the...
Patent
1980-06-18
1982-07-20
Pellinen, A. D.
Electricity: power supply or regulation systems
Self-regulating
Using a three or more terminal semiconductive device as the...
307499, 307571, 323901, G05F 316
Patent
active
043408516
ABSTRACT:
An improved start-up circuit is provided for self-biased circuits of the type connected to a supply voltage and having biasing currents stable at two operating points at which the biasing currents are either zero or nonzero in value when the supply voltage is nonzero and having sufficient regenerative feedback to raise the level of the biasing currents to the nonzero value when an initial current is provided to the circuit. The start-up circuit includes a resistive element which provides a current path from the supply voltage to the self-biased circuit and a transistor element, responsive to the current flow through the path for supplying an initial current to the self-biased circuit, whereupon the regenerative feedback causes the circuit to draw a current related to the biasing current through the current path as the biasing currents reach the nonzero operating point. The current flow through the path causes the transistor element to disconnect the initial current from the self-biased circuit as the nonzero operating point is reached. The start-up circuit draws no power from the voltage supply after the disconnection occurs.
REFERENCES:
patent: 3984761 (1976-10-01), Edington
patent: 4009432 (1977-02-01), Dingwall et al.
patent: 4051392 (1977-09-01), Rosenthal et al.
Ronald W. Russell and Thomas M. Frederiksen, "Automotive and Industrial Electronic Building Blocks", IEEE Journal of Solid-State Circuits, vol. SC-7, No. 6 Dec. 1972, pp. 446-454, and Particularly p. 450.
Paul R. Gray and Robert G. Meyer, "Analysis and Design of Analog Integrated Circuits", John Wiley and Sons, 1977, Appendix A4.2.
Koppel Richard S.
Pellinen A. D.
Precision Monolithics, Inc.
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