Low-voltage comparator with wide input voltage swing

Details Low-voltage comparator with wide input voltage swing Low-voltage comparator with wide input voltage swing

1998-10-16

2000-11-14

Tran, Toan

Miscellaneous active electrical nonlinear devices, circuits, and

Specific signal discriminating without subsequent control

By amplitude

327536, H03K 522, G05F 110

Patent

active

06147519&

ABSTRACT:
A low voltage comparator for amplifying a voltage difference between a pair of differential inputs. A boost capacitor charges to a boost voltage in excess of the low supply voltage, a differential pair of MOSFET transistors, each said transistor including a gate, a source, a drain, and a body terminal. The comparator also includes a latch mechanism built from a cross-coupled pair of MOSFET transistors for latching the compared result. A well capacitor is used to charge the body terminal of the differential pair where the boost capacitor and the well capacitor boost the common source voltage and reduce the threshold voltage of the differential pair to allow the supply voltage to be at relatively low level.

REFERENCES:
patent: 5572158 (1996-11-01), Lee et al.
patent: 5719525 (1998-02-01), Khoury
patent: 5805021 (1998-09-01), Brehmer
patent: 5811994 (1998-09-01), Ricotti et al.

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