Amplifiers – With semiconductor amplifying device – Including current mirror amplifier
Reexamination Certificate
2006-07-25
2006-07-25
Choe, Henry (Department: 2817)
Amplifiers
With semiconductor amplifying device
Including current mirror amplifier
C323S315000
Reexamination Certificate
active
07081797
ABSTRACT:
A multiplying current mirror provides at least one base current compensation stage between two other stages that establish a desired gain n. (n−1) compensation stages are provided for n>1, and [(1
)−1] compensation stages for n<1. The compensation stages can be established as series connected repetitions of a basic cell stage. Each stage after the first includes a diode-connected bipolar transistor, with a low overall transistor count.
REFERENCES:
patent: 4485351 (1984-11-01), Schemmel et al.
patent: 4801892 (1989-01-01), Yamakoshi et al.
patent: 4879524 (1989-11-01), Bell
Analog Devices Inc.
Choe Henry
Kopel, Patrick & Heybl
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