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Dual Response Regulator

IP.com Disclosure Number: IPCOM000091371D
Original Publication Date: 1968-Jan-01
Included in the Prior Art Database: 2005-Mar-05
Document File: 3 page(s) / 59K

Publishing Venue

IBM

Related People

Klein, RJ: AUTHOR

Abstract

In some large computers, there is a requirement for large currents at a closely controlled low voltage. Since the computer can have a machine cycle time of the order of one microsecond, the response of the power supply to load changes must be rapid. Computer circuitry can comprise a load 12 which varies in time with operations of the machine and is fed by power transmission line 13 from rectifying series preregulator 14 connected to source 19. Final control of the load voltage is accomplished by operation of shunt regulator 15 connected as closely as is practicable to load terminals 21 and 22.

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Dual Response Regulator

In some large computers, there is a requirement for large currents at a closely controlled low voltage. Since the computer can have a machine cycle time of the order of one microsecond, the response of the power supply to load changes must be rapid. Computer circuitry can comprise a load 12 which varies in time with operations of the machine and is fed by power transmission line 13 from rectifying series preregulator 14 connected to source 19. Final control of the load voltage is accomplished by operation of shunt regulator 15 connected as closely as is practicable to load terminals 21 and 22.

Continuity of input to line 13 is enhanced by freewheeling diode 32 and inductor 35 at the output of preregulator 14. Since regulator 15 is fast-acting and compensates for short term changes in the load current, preregulator 14 can have a relatively slow response. Therefore the value of inductor 35 can be substantial.

Regulator 15 includes load resistors 36 and 37 and power transistors 39 and 40 under the control of amplifier transistor 42. First control circuit 49 responds to the input voltage across load 12, via lines 47 and 48, to provide a control output on line 53 connected to the base of transistor 42 of regulator 15. Second control circuit 50 responds to the voltage across lines 51 and 52 connected to sense the current through regulator 15, and provides an output on lines 54 and 55 to circuit 56 which controls preregulator 14.

Circuit 49 includes differential amplifier 61 which compares a standard voltage at 60 with the sensed load voltage on line 48. The output of 61, amplified at 62, is connected to control line 53 of regulator 15. Circuit 50 includes differential amplifier 65 which compares the signal on line 52 with a reference taken at 64 and...