Circuit for adjusting a circuit parameter of a circuit

Details Circuit for adjusting a circuit parameter of a circuit Circuit for adjusting a circuit parameter of a circuit

1994-06-10

1995-09-12

Callahan, Timothy P.

Miscellaneous active electrical nonlinear devices, circuits, and

Specific identifiable device, circuit, or system

Fusible link or intentional destruct circuit

H01H 3776

Patent

active

054500303

ABSTRACT:
A circuit parameter adjustment circuit for adjusting a circuit parameter (e.g., resistance or capacitance) of a circuit having N network elements connected between two nodes. The circuit parameter adjustment circuit includes N zapping devices and N switching devices coupled between the N zapping devices and the N network elements. When a zapping control signal is low, the N switching devices are directly responsive to respective ones of the N trimming signals for bypassing or not bypassing the respective ones of the N network elements, thereby facilitating testing of the value of the circuit parameter for different combinations of the trimming signals, prior to zapping the zapping devices. Then, after the optimum combination of trimming signals has been selected, the zapping control signal is driven high, whereby the N zapping devices are zapped or unzapped, depending upon the logic level of the respective ones of the N trimming signals.

REFERENCES:
patent: 5047664 (1991-09-01), Moyal
patent: 5361001 (1994-11-01), Stolfa

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