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US 5,642,078 AGranted
Amplifier having frequency compensation by gain degeneration
AssigneeCrystal Semiconductor Corporation
InventorsMohammad J. Navabi, Baker P. L. Scott, III
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AssigneeCrystal Semiconductor Corporation
InventorsMohammad J. Navabi, Baker P. L. Scott, III
Estimating the term…
An amplifier having an inverting and a non-inverting input and at least one output is compensated by dynamically varying the transconductance of a gain stage in accordance with the gain of the output stage of the amplifier. The amplifier comprises a gain section having at least one output, where a gm of the gain section varies with a transconductance control signal. The amplifier further comprises an output stage comprising a output drive device controlled by an output of the gain section. A bias control circuit is coupled to drive the transconductance control input of the gain section, the bias control circuit increasing a differential mode transconductance of the first gain stage when the active pullup or pulldown output drive device has low gain.
An amplifier having inverting and non-inverting inputs and at least one output comprising:
An amplifier having at least one input and at least one output comprising:
A method of compensating an amplifier having a gain section and an output stage, where a current in the output stage varies with output conditions or signal levels, and a transconductance of the output stage varies with the current in the output stage, comprising:
Dependencies are inferred from the claim text.