Cross-coupled folding circuit and analog-to-digital...

Details Cross-coupled folding circuit and analog-to-digital... Cross-coupled folding circuit and analog-to-digital...

2007-10-02

2007-10-02

Nguyen, Khai M. (Department: 2819)

Coded data generation or conversion

Analog to or from digital conversion

Analog to digital conversion

C341S155000, C341S156000, C341S158000

Reexamination Certificate

active

10566551

ABSTRACT:
A cross coupled folding circuit comprises a reference voltage circuit to supply m reference voltages, an amplifier circuit to provide control signals, in response to an input signal and to the reference voltages and 2n−I three times cross coupled folding circuits, each of which comprising three differential transistor pairs, said differential transistors pairs being controlled by said control signals and active in a voltage range around a respective one of said reference voltages, with m=3(2″−1). In cascade with said 2n−I folding circuits, there are differential transistor pairs in n−1 successive steps 2n−1, 2n—2, 20. To obtain complete folding, switching circuits are provided, cooperating with the transistor pairs in the last2n−2 steps of the cascade configuration, to supply the respective control signals to those transistors of the respective differential transistor pairs that provide complete folding.

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