Universal current source and current sink interface

Details Universal current source and current sink interface Universal current source and current sink interface

1999-05-28

2000-10-24

Tran, Toan

Miscellaneous active electrical nonlinear devices, circuits, and

Specific identifiable device, circuit, or system

Nonlinear amplifying circuit

327561, 327333, G06G 712

Patent

active

061373516

ABSTRACT:
An interface circuit for interfacing a data bus with a current sinking sensor or a current sourcing sensor. An input terminal is connected between a cathode of a first diode and an anode of a second diode. The anode of the first diode is connected to a first input terminal of a comparator, such as a differential amplifier. The cathode of the second diode is connected to a second input of the comparator. Two pairs of in-series resistors are connected between a voltage supply. The anode of the first diode is connected between two resistors of the first pair of resistors. The cathode of the second diode is connected between two resistors of the other pair of resistors. An output of the comparator is connected to an output terminal. The interface circuit of this invention can be connected between an input circuit and an output circuit, to interface a sensor parameter and the corresponding input current or signal to the data bus and a corresponding output current or signal.

REFERENCES:
patent: 3731232 (1973-05-01), Hekimian
patent: 4035733 (1977-07-01), Morrow et al.
patent: 4392068 (1983-07-01), Welles, II
patent: 4495428 (1985-01-01), Ishigaki
patent: 4689499 (1987-08-01), Yee

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