Current mirror utilizing amplifier to match operating voltages o

Details Current mirror utilizing amplifier to match operating voltages o Current mirror utilizing amplifier to match operating voltages o

1998-10-05

2000-05-16

Lee, Benny

Amplifiers

With semiconductor amplifying device

Including current mirror amplifier

330257, 323315, H03F 304

Patent

active

06064267&

ABSTRACT:
A current mirror utilizes an operational amplifier to provide linear operation over a wide output voltage range. The current mirror includes input transconductance, output transconductance, input cascode and output cascode devices. The operational amplifier has two inputs, one of which is coupled to a node between the output transistors, and the other of which is coupled to a node between the input transistors. The output of the amplifier is used to drive the control terminal of the input cascode device so that the operating voltage of the input transconductance device will be approximately equal to that of the output transconductance device.

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patent: 5666046 (1997-09-01), Mietus
patent: 5694033 (1997-12-01), Wei et al.
Johns, D. et al., Analog Integrate Circuit Design, John Wiley & Sons, Inc., pp. 256-303, 1997.
Ramirez-Angulo, J., "Current Mirrors with Low Input and Low Output Voltage Requirements," Proceedings on the Midwest Symposium on Circuits and Systems, US New York, IEEE, Symp. 37, pp. 107-110, Mar. 8, 1994.

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