US 2006/0220724 A1 · PCMO RESISTOR TRIMMER

Abstract

Using programmable resistance material for a matching resistor, a resistor trimming circuit is designed to reversibly trim a matching resistor to match a reference resistor. The programmable resistance materials such as metal-amorphous silicon metal materials, phase change materials or perovskite materials are typically used in resistive memory devices and have the ability to change the resistance reversibly and repeatably with applied electrical pulses. The present invention reversible resistor trimming circuit comprises a resistance bridge network of a matching resistor and a reference resistor to provide inputs to a comparator circuit for generating a comparing signal indicative of the resistance difference. This comparing signal can be used to control a feedback circuit to provide appropriate electrical pulses to the matching resistor to modify the resistance of the matching resistor to match that of the reference resistor.

Claims20

Dependent claims

A circuit for reversible trimming of a matching resistor to a reference resistor wherein a material of the matching resistor comprises a programmable resistance material, the circuit comprising

a resistor bridge network comprising the reference resistor and the matching resistor;
a comparator circuit in communication with the resistor bridge network for comparing the resistance values of the reference resistor and the matching resistor and for generating a comparing signal indicative of the difference between the reference resistor and the matching resistor;
and
a pulse feedback circuit coupled to the resistor bridge network, the feedback circuit coupled to the comparator circuit and providing a pulsed electrical signal to the matching resistor corresponding to the comparing signal.

1 more element

Dependencies are inferred from the claim text.

Pcmo resistor trimmer

Life of this patent

Pcmo resistor trimmer

Life of this patent

Abstract

Claims20