Wide-band transconductance generator

Details Wide-band transconductance generator Wide-band transconductance generator

1991-05-03

1992-09-22

Mottola, Steven

Amplifiers

With semiconductor amplifying device

Including push-pull amplifier

330255, 330265, H03F 126

Patent

active

051500744

ABSTRACT:
A transconductance generator including a cross-coupled quad circuit having first and second pairs of complementary transistors, wherein one of the first pair is in series with a complementary one of the second pair, and the other two transistors also are in series. Two input terminals are provided, one for each pair of cross-quad transistors. Two current mirrors are provided, one being coupled to a set of two NPN cross-quad transistors, and the other coupled to the two PNP cross-quad transistors. The cross-quad circuit and the current mirrors provide an output signal through a pair of output transistors. By connecting the output signal to the second input terminal, negative feedback is developed to provide a unity-gain buffer. A number of special compensating circuits are provided to assure minimum distortion effects in the output signal.

REFERENCES:
patent: 4595883 (1986-06-01), Nakayama
patent: 4970470 (1990-11-01), Gosser

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