Patent ID: 11914412
Assignee: TEXAS INSTRUMENTS INCORPORATED
Field: Control (Instruments)
Classification: CPC G  H | IPC G  H

Claim 18:
19. A device comprising:
a bandgap reference circuit configured to provide a bandgap voltage based on power at a battery input terminal;
a sensor coupled to the bandgap reference circuit, the sensor configured to be driven by the bandgap voltage and to provide an analog measurement signal; and
an analog-to-digital converter (ADC) coupled to the bandgap reference circuit and to the sensor, the ADC configured to be driven by the bandgap voltage and to convert the analog measurement signal into a digital signal;
in which the bandgap reference circuit includes:
a first current mirror circuit coupled to a power input terminal;
a first stage coupled to the first current mirror circuit;
a second stage coupled to the first stage and to the first current mirror circuit;
an amplifier coupled to the first current mirror circuit, the amplifier having first and second input terminals, in which the first input terminal of the amplifier is coupled to the first stage, and the second input terminal of the amplifier is coupled to the second stage; and
a second current mirror circuit coupled to the amplifier and to the first and second stages.