Adjustable current source

Details Adjustable current source Adjustable current source

1979-02-23

1980-12-23

Larkins, William D.

Amplifiers

With semiconductor amplifying device

Including differential amplifier

307296R, 357 2, H0lL 2724, H03F 345

Patent

active

042413150

ABSTRACT:
A current source having two current paths connected as current mirrors with an amorphous material device in one of the current paths which is electrically alterable from a high impedance state to lower high impedance states without switching to a low impedance state. A diode interconnects the amorphous material element to the current path to prevent damage to the current path during electrical alteration of the amorphous material device. The current source is included in a differential amplifier and operational amplifier to provide fine incremental trim or offset adjustment.

REFERENCES:
patent: 3761787 (1973-09-01), Davis
patent: 3818252 (1974-06-01), Chiba et al.
patent: 4045746 (1977-08-01), Wheatley, Jr.

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