Voltage to current converter and method for converting

Details Voltage to current converter and method for converting Voltage to current converter and method for converting

2007-06-12

2007-06-12

Pascal, Robert (Department: 2817)

Amplifiers

With semiconductor amplifying device

Including gain control means

Reexamination Certificate

active

10984324

ABSTRACT:
A voltage to current converter comprises a signal stage (1) with a first transistor (11) and a first resistor (12). The first transistor (11) is adapted to be fed with an input signal voltage (Vin). The converter is adapted to generate an output current, comprising an output DC bias current (IB1) and an output signal current (iout), and to provide a gain adjustment through the variation of the first resistor (12). The converter further comprises a bias stage (2), adapted to generate and feed the signal stage (1) with an input DC bias voltage (VDC), which input DC bias voltage (VDC) is adapted to keep the output DC bias current (IB1) constant during the variation of the first resistor (12).

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European Search Report for application No. EP 04445114.4, 2 pages.
European Office Action for application No. EP04445114.4, 4 pages.
Wada K. et al: “Wide-Input Range Linear Voltage-to-Current Converter Using Equivalent Mosfets Without Cutoff Region” leice Transactions On Fundamentals of Electronics, Communications and Computer Sciences, Institute of Electronics Information and Comm. Eng. Tokyo, JP vol. E85-A, No. 2, Feb. 2002 (2002-02), pp.347-353.

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