Electricity: power supply or regulation systems – In shunt with source or load – Using diode
Patent
1981-10-15
1983-03-29
Shoop, William M.
Electricity: power supply or regulation systems
In shunt with source or load
Using diode
323231, 307494, 307551, 307565, H03K 508
Patent
active
043785212
ABSTRACT:
A circuit which performs regulator or limiter functions at current and voltage levels below the operating ranges of conventional zener diodes. The output of an op amp is connected through a diode to a main input terminal which may be connected between a power source and one end of a load resistor. A first current limiting resistor connects the main input terminal to the inverting input of the op amp. A second current limiting resistor connects the non-inverting input of the op amp to the wiper terminal of a potentiometer which permits adjustment of a simulated zener voltage V.sub.z. A pair of supply voltage terminals of the op amp are connected to voltages V.sub.cc and V.sub.ee, respectively. A pair of fixed terminals of the potentiometer are also connected to voltages V.sub.cc and V.sub.ee, respectively. The simulated zener voltage V.sub.z may be positive or negative, and may be adjusted to any value within limits determined by voltages V.sub.cc and V.sub.ee, the op amp saturation voltages, the current sinking capability of the op amp, and the voltage drop across the diode.
REFERENCES:
patent: 3153152 (1964-10-01), Hoffman, Jr.
patent: 3166720 (1965-01-01), Rosen et al.
patent: 3237002 (1966-02-01), Patmore
patent: 3248569 (1966-04-01), Weekes
patent: 3268830 (1966-08-01), Ragsdale
patent: 3327131 (1967-06-01), Grimmer
patent: 3404348 (1968-10-01), Hansen et al.
patent: 3851259 (1974-11-01), Porawski
patent: 3959717 (1976-05-01), Pitel
patent: 4138612 (1979-02-01), Schlesinger
patent: 4155059 (1979-05-01), Doi
patent: 4321524 (1982-03-01), Petrovic
patent: 4360746 (1982-11-01), Branson
A. Crosier, "Negative Conductance Circuit", IBM Technical Disclosure Bulletin, vol. 15, No. 1, Jun. 1972, pp. 138-139.
V. A. Scotto, "Voltage Reference Circuit", IBM Technical Disclosure Bulletin, vol. 16, No. 4, Sep. 1973, p. 1101.
C. Morgan and H. Stirling, "Hybrid Zener Circuit", IBM Technical Disclosure Bulletin, vol. 16, No. 9, Feb. 1974, pp. 2908-2909.
David V. Kerns, Jr., "A Zener Diode Model for Computer Circuit Simulations", International Journal of Electronics, vol. 45, No. 4, 1978, pp. 417-424.
General Dynamics Pomona Division
Jester Michael H.
Johnson Edward B.
Martin Neil F.
Shoop William M.
LandOfFree
Active zener diode substitute circuit does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Active zener diode substitute circuit, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Active zener diode substitute circuit will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1205321