Switched current mirror
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United States of America Patent
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-
Oct 1, 1985
Grant Date -
N/A
app pub date -
Oct 4, 1983
filing date -
Oct 4, 1983
priority date (Note) -
Expired
status (Latency Note)
Importance
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.
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