Integrated circuit having permanent adjustment circuitry which r

Details Integrated circuit having permanent adjustment circuitry which r Integrated circuit having permanent adjustment circuitry which r

1987-04-14

1988-10-04

Larkins, William D.

Electrical resistors

Incased, embedded, or housed

Element in insulation with outer metallic sheath

357 13, 338 92, H01L 2704, H01C 1018

Patent

active

047758848

ABSTRACT:
An integrated circuit resistor adjustment network with resistors (R1, R2, R3, R4) which may be paralleled by trimming resistors (R5, R7, R6, R8, respectively) upon electrical "zapping" of Zener diodes (Z1, Z2, Z3, Z4, respectively) connected in series with the trimming resistors. The Zener diodes (Z1, Z4 or Z2, Z3) are connected in inverse series via inverse paralleled diodes (D1, D2 or D3, D4 respectively) which are non-conductive during normal operation, but conduct during higher voltage zapping operation to permit the currents for zapping the Zener diodes to bypass the resistors. By having the trimming resistors in two branches (R1, R5, R4, R6 and R2, R7, R3, R8 respectively) so arranged that in one branch a resistor of value 4R may be paralleled with a 1R resistor and an 8R resistor may be paralleled with a 2R resistor, and in the other branch, a 4R resistor may be paralleled with an 2R resistor and an 8R resistor may be paralleled with a 1R resistor, offsets can be trimmed in either direction in approximately equally spaced steps.

REFERENCES:
patent: 4412241 (1983-10-01), Nelson
patent: 4451839 (1984-05-01), Nelson
Lin, Integrated Electronics, (Holden-Day, San Francisco, 1967) pp. 227-229.

Affiliated with

Also associated with

Rating

Integrated circuit having permanent adjustment circuitry which r does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Integrated circuit having permanent adjustment circuitry which r, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Integrated circuit having permanent adjustment circuitry which r will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2158566