US 2020/0007145 A1 · BATTERY CHARGING AND MEASUREMENT CIRCUIT

Abstract

An example device comprises a digital-to-analog converter (DAC) comprising first and second transistors coupled to a first amplifier, the second transistor coupled to a first output of the DAC and to an output of the first amplifier, and third and fourth transistors coupled to the first amplifier and to a second output of the DAC, the third and fourth transistors switchably coupled to a voltage supply and to the first transistor. The device also comprises a first node coupled to the first output of the DAC and to a resistor. The device further includes a second node coupled to the second output of the DAC, and a second amplifier coupled to the second node and to the first transistor and switchably coupled to the third and fourth transistors. The device also comprises a comparator coupled to the first node.

Claims20

Dependent claims

A device, comprising:

a digital-to-analog converter (DAC) comprising:
first and second transistors coupled to a first amplifier, the second transistor coupled to a first output of the DAC and to an output of the first amplifier;
third and fourth transistors coupled to the first amplifier and to a second output of the DAC, the third and fourth transistors switchably coupled to a voltage supply and to the first transistor;
a first node coupled to the first output of the DAC and to a resistor;
a second node coupled to the second output of the DAC;
a second amplifier coupled to the second node and to the first transistor and switchably coupled to the third and fourth transistors;
and
a comparator coupled to the first node.

5 more elements

Dependencies are inferred from the claim text.

Battery charging and measurement circuit

Life of this patent

Battery charging and measurement circuit

Life of this patent

Abstract

Claims20