Programming and control of an integrated circuit using an...

Details Programming and control of an integrated circuit using an... Programming and control of an integrated circuit using an...

2006-09-05

2006-09-05

Pert, Evan (Department: 2826)

Miscellaneous active electrical nonlinear devices, circuits, and

Specific signal discriminating without subsequent control

By amplitude

C327S056000, C323S274000

Reexamination Certificate

active

07102394

ABSTRACT:
A circuit in an integrated circuit having input terminals coupled to a resistor network for selecting one of multiple digital states includes a tri-state circuit, a multiplexer, a comparator and a control circuit. A DAC can be used to generate a set of comparison voltage levels. The circuit detects the power connection and the resistance values of at least two resistors in the resistor network having a third resistor of fixed resistance. The resistance values for the two resistors are selected from a set of resistance values corresponding to the number of digital stages which can be programmed on each terminal. The power connection option doubles the number of digital stages to be programmed on each terminal. Thus, multiple programming states can be assigned to each control pin of an integrated circuit and a large number of programming states can be programmed using a small number of control pins.

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