Adaptable current mirror

Details Adaptable current mirror Adaptable current mirror

1990-10-31

1991-12-17

Mottola, Steven

Amplifiers

With semiconductor amplifying device

Including current mirror amplifier

330277, 330 9, H03F 316

Patent

active

050737597

ABSTRACT:
An integrated circuit amplifier having a random input offset voltage is adaptable such that then input offset voltage may be cancelled out. An inverting input node is a floating input node and is coupled to a source of input signal by a first capacitor. A second capacitor is connected between the output of the amplifier and the floating node. An ultraviolet window above the second capacitor allows the floating node to be charged, by the application of ultraviolet light, to a voltage which effectively cancels the input offset voltage. The ultraviolet window and capacitor electrodes are arranged such that the ultraviolet light may strike only the desired areas of the structure.

REFERENCES:
patent: 4935702 (1990-06-01), Mead et al.

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