Bootstrapping circuit capable of sampling inputs beyond...

Details Bootstrapping circuit capable of sampling inputs beyond... Bootstrapping circuit capable of sampling inputs beyond...

2007-08-07

2007-08-07

Tra, Quan (Department: 2816)

Miscellaneous active electrical nonlinear devices, circuits, and

Gating

Signal transmission integrity or spurious noise override

C327S589000, C327S536000

Reexamination Certificate

active

11159005

ABSTRACT:
The bootstrapping circuit capable of sampling inputs beyond supply voltage includes: a bootstrapped switch MN20coupled between an input node and an output node; a first transistor MP13having a first end coupled to a control node of the bootstrapped switch MN20;a clock bootstrapped capacitor C13having a first end coupled to a second end of the first transistor MP13;a second transistor MN27coupled between the first end of the first transistor MP13and a supply node, and having a control node coupled to a first clock signal node PHI; a third transistor MN26coupled between the second end of the first transistor MP13and the supply node; a charge pump having a first output coupled to a control node of the third transistor MN26;a level shifter having a first output coupled to a second end of the clock bootstrapped capacitor C13;a fourth transistor MN25coupled between the supply node and a control node of the first transistor MP13,and having a control node coupled to a second output of the charge pump; a capacitor coupled between a second output of the level shifter and a control node of the first transistor; and a fifth transistor MN28coupled between the control node of the bootstrapped switch MN20and a common node.

REFERENCES:
patent: 7049877 (2006-05-01), Clara et al.
patent: 2006/0202735 (2006-09-01), Aksin et al.
patent: 2006/0202736 (2006-09-01), Aksin et al.

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