ANALOG-TO-DIGITAL CONVERTER CIRCUIT AND METHOD OF CONTROLLING ANALOG-TO-DIGITAL CONVERTER CIRCUIT

摘要

An analog-to-digital converter circuit includes a plurality of conversion stages that are cascaded to be coupled in series. Each of the plurality of conversion stages includes a signal holding circuit configured to hold an input voltage, an analog-to-digital converter configured to convert the input voltage into a digital signal based on a first reference voltage, a digital-to-analog converter configured to generate a first voltage according to the digital signal, the first reference voltage, and the input voltage, an amplifier configured to amplify the first voltage to generate an output voltage, and a reference holding circuit configured to hold a holding voltage that is in proportion to the first reference voltage. The amplifier is coupled to the reference holding circuit to receive and amplify the holding voltage to generate a second reference voltage.

主权项

1. An analog-to-digital converter circuit comprising:
a plurality of conversion stages that are cascaded to be coupled in series, each of the plurality of conversion stages including
a signal holding circuit configured to hold an input voltage;an analog-to-digital converter configured to convert the input voltage into a digital signal based on a first reference voltage;a digital-to-analog converter configured to generate a first voltage according to the digital signal, the first reference voltage, and the input voltage;an amplifier configured to amplify the first voltage to generate an output voltage; anda reference holding circuit configured to hold a holding voltage that is in proportion to the first reference voltage, the amplifier being coupled to the reference holding circuit to receive and amplify the holding voltage to generate a second reference voltage.