Accurate current conveyor

Details Accurate current conveyor Accurate current conveyor

H - Electricity

03

K

328/185

H03K 17/56 (2006.01) G05F 1/56 (2006.01) G05F 3/26 (2006.01) H03F 3/343 (2006.01)

Patent

CA 1281386

ABSTRACT OF THE DISCLOSURE In the class of electronic circuits known as current conveyors, limitations in the areas of frequency bandwidth, transient response, output impedance, distortion, accuracy, and suitability for integration are overcome by means of a current conveyor comprising a Wilson current mirror of one polarity type cross-coupled with a second Wilson current mirror of the opposite polarity type. The first Wilson current mirror is connected to an input port and a reference port. The second Wilson current mirror is supplied with current by a current-splitting circuit which also supplies an output port with a current that is proportional to, preferably half, the current supplied to the second current mirror. An emitter de-generation compensation scheme may optimize the transient response and stability of the mirrors. The current splitter may also comprise current mirrors. A voltage-to-current converter may be realised by connecting suitable resistors in series with the input and reference ports, respectively.

587317

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