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Video Differential Amplifier with Miller Compensation

IP.com Disclosure Number: IPCOM000093053D
Original Publication Date: 1967-Apr-01
Included in the Prior Art Database: 2005-Mar-05
Document File: 2 page(s) / 25K

Publishing Venue

IBM

Related People

Graham, IH: AUTHOR

Abstract

This is for extending the bandwidth in video differential amplifiers. In such amplifiers the bandwidth is limited by the capacitance to ground and the Miller capacitance. V(b)=V(1)-I(c)R where R is the effective impedance of the input circuit. (Image Omitted)

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Video Differential Amplifier with Miller Compensation

This is for extending the bandwidth in video differential amplifiers. In such amplifiers the bandwidth is limited by the capacitance to ground and the Miller capacitance. V(b)=V(1)-I(c)R where R is the effective impedance of the input circuit.

(Image Omitted)

The bandwidth can be extended by cancellation of the negative feed-back due to the Miller capacitance. This is accomplished by feedback of a current to the input. Such current is in phase with the input signal and equal in magnitude to the negative feedback caused by the Miller effect.

The resulting bandwidth is only subject to stray wiring capacitance and is effectively V(b) = V(I).

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