Early effect cancelling circuit, differential amplifier,...

Details Early effect cancelling circuit, differential amplifier,... Early effect cancelling circuit, differential amplifier,...

2008-04-01

2008-04-01

Vu, Bao Q. (Department: 2838)

Electricity: power supply or regulation systems

Self-regulating

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

C323S313000, C323S314000

Reexamination Certificate

active

07352163

ABSTRACT:
In an input transistor of current mirror circuit, it is intended to prevent the current generated by Early effects from appearing in the output current of the current mirror circuit. Having an Early voltage detector22of same connection and structure as a driver circuit21, and connected in parallel to the driver circuit21, the current flowing in input transistor Q9of the Early voltage detector22is detected. Output current (current IQ11) of Early voltage detector22is added to input current (current IQ5) of driver circuit21. As a result, in input current (current IQ7) of current mirror circuit25, current α due to Early voltage effects can be canceled. At the same time, current α due to Early voltage effects generated in input transistor Q5of current mirror circuit25is prevented from appearing in output current (current IQ8) of current mirror circuit25.

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patent: 2001-147726 (2001-05-01), None
patent: 2002-244748 (2002-08-01), None

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