Folding circuit and analog-to-digital converter

Details Folding circuit and analog-to-digital converter Folding circuit and analog-to-digital converter

2011-08-16

2011-08-16

Nguyen, Linh V (Department: 2819)

Coded data generation or conversion

Analog to or from digital conversion

Analog to digital conversion

C341S155000, C341S158000

Reexamination Certificate

active

07999717

ABSTRACT:
A folding circuit and an analog-to-digital converter wherein a response to small signals is improved, a load on a clock signal can be reduced, and the increase of circuit area can be prevented. The circuit includes a reference voltage generating circuit that generates a plurality of differential voltages as reference voltages, and a plurality of amplification circuits that convert differential voltages between the plurality of reference voltages and an analog input voltage to differential currents, and output these differential currents. The output ends of the amplification circuits are alternately connected. Each of the amplification circuit is configured by a differential amplifier circuit having cascode output transistors (145, 146). A switch (144), which is turned on in synchronization with the control clock, is provided between the both sources of the cascode output transistors (145,146).

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