Switched current mirror

Details Switched current mirror Switched current mirror

1983-10-04

1985-10-01

Wong, Peter S.

Electricity: power supply or regulation systems

Self-regulating

Using a three or more terminal semiconductive device as the...

323316, G05F 320

Patent

active

045448787

ABSTRACT:
The input (16) and output (20) MOS transistors of a current mirror (10) have their sources connected to a supply voltage node (12). The gate of the input transistor (16) is connected to its drain and is also connected to the gate of the output transistor (20) through an isolation switch (24). The gate of the output transistor (20) is connected to the supply voltage node (12) through a disable switch (26). Closing of the disable switch (26) and opening of the isolation switch (24) turns off current in the output transistor (20). Opening the disable switch (26) and closing the isolation switch (24) turns the output current on again.
Also disclosed is a mirror (28) having switches (30), (32) configured for various logic functions. A voltage-controlled oscillator (34) and a phase detector circuit 72 having a switched current input provided by switched current mirrors (40, 42, 80, 82) is described.

REFERENCES:
patent: Re29910 (1979-02-01), Ahmed
patent: 4001731 (1977-01-01), Van Sluys
patent: 4262221 (1981-04-01), Dingwell
patent: 4359649 (1982-11-01), Mundel

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