Compensated reference voltage source

Details Compensated reference voltage source Compensated reference voltage source

1980-07-07

1981-09-15

Shoop, William M.

Electricity: power supply or regulation systems

Self-regulating

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

323231, 307297, 307318, G05F 320

Patent

active

042900050

ABSTRACT:
A compensated reference voltage source for providing a stable output voltage despite variations in operating voltage. The circuitry includes a series arrangement of a first resistance, a Zener diode, and a second resistance connected between a source of operating voltage and ground. A first transistor has its collector connected to the juncture of the first resistance and the Zener diode, its base connected to the juncture of the Zener diode and the second resistance, and its emitter connected to ground. A second transistor has its base and emitter connected directly to the corresponding electrodes of the first transistor and its collector connected to an output terminal. A third transistor has its collector connected to the source of operating voltage, its emitter connected to the output terminal, and its base connected to the collector of the first transistor. The base-emitter characteristics of the transistors are essentially identical. The voltage across the Zener diode remains constant despite variations in the operating voltage. However, the voltage at the collector of the first transistor varies because of changes in current flow across its base-emitter junction. Because of the interconnections, equal currents flow through each of the transistors. Since the base-emitter characteristics of the transistors are identical, the voltage drops across the base-emitter junctions of the first and third transistors are equal. Thus, the voltage at the output terminal is equal to the voltage across the Zener diode and remains constant despite variations in the operating voltage.

REFERENCES:
patent: 3522521 (1970-08-01), Lloyd
patent: 3829717 (1974-08-01), Harrison
patent: 4063147 (1977-12-01), Hatanaka et al.

Affiliated with

Also associated with

Rating

Compensated reference voltage source does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Compensated reference voltage source, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Compensated reference voltage source will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-392675