Amplifier with a second active element being cascode connected t

Details Amplifier with a second active element being cascode connected t Amplifier with a second active element being cascode connected t

1995-12-28

1998-05-26

Saras, Steven

Computer graphics processing and selective visual display system

Data responsive crt display control

Color display

345204, 348708, 330291, 330310, G09G 500, H03F 108, H04N 5217

Patent

active

057573409

ABSTRACT:
An amplifier circuit in a display device for a monitor unit in a computer system or the like, includes first active element whose control electrode is supplied with a signal from an input terminal; a second active element cascade-connected to the first active element; a third active element so connected to the second active element that a junction thereof is connected to an output terminal; an impedance element disposed between the input terminal and the third active element and capable of changing the impedance in accordance with the frequency of the input signal; a first resistance element connected between the junction of the second and third active elements and the control electrode of the first active element; and a second resistance element connected between the input terminal and the control electrode of the first active element and serving to determine the signal amplification factor in cooperation with the first resistance element. Since the second active element is cascade-connected to the first active element, no manipulation is necessary for adjusting the component elements, and generation of any smear or sag resulting from variation of the feedback capacitance can be suppressed at low cost.

REFERENCES:
patent: 3732356 (1973-05-01), Matzek
patent: 4354202 (1982-10-01), Harlan
patent: 4577234 (1986-03-01), Harlan
patent: 4825292 (1989-04-01), Knibbe
patent: 5089754 (1992-02-01), George
patent: 5515005 (1996-05-01), Yoshioka

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