Code setting circuit

Details Code setting circuit Code setting circuit

1991-10-15

1992-12-22

Westin, Edward P.

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

307303, 307446, H02H 720, H03K 1718

Patent

active

051736160

ABSTRACT:
A code setting circuit for outputting a plurality of bits of code setting signal to a code generation circuit, includes a plurality of unitary circuits each generating one bit of the code setting signal. Each of the unitary circuits includes a first P-channel transistor having a source connected at to a high voltage supply line and a gate connected to commonly receive a power-on signal, and an N-channel effect transistor having a drain connected to a drain of of the first P-channel transistor and a source to a fusing-off pulse application pad. A second P-channel transistor is connected in parallel to the P-channel effect transistor and a gate connected to an output of a first inverter having an input connected to the drain of the first P-channel transistor. A thin film resistor is connected between the fusing-off pulse application pad and a ground line. A second inverter is connected at its input to the drain of the first P-channel transistor and has an output supplying a binary signal to the input of the code generation circuit.

REFERENCES:
patent: 4223277 (1980-09-01), Taylor et al.
patent: 4546455 (1985-10-01), Iwahashi et al.
patent: 4608530 (1986-08-01), Bacrania
patent: 4716302 (1987-12-01), Flannagan et al.

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