US 12,316,340 B2
Continuous-time delta-sigma analog-to-digital converter
Daniel Canniff, Brookline, MA (US); and Mariana Tosheva Markova, Cambridge, MA (US)
Assigned to ANALOG DEVICES, INC., Wilmington, MA (US)
Filed by Analog Devices, Inc., Wilmington, MA (US)
Filed on Jan. 20, 2023, as Appl. No. 18/157,409.
Prior Publication US 2024/0250692 A1, Jul. 25, 2024
Int. Cl. H03M 1/00 (2006.01); H03M 1/50 (2006.01); H03M 1/70 (2006.01)
CPC H03M 1/50 (2013.01) [H03M 1/70 (2013.01)] 21 Claims
OG exemplary drawing
 
1. An integrated circuit, comprising:
an analog-to-digital converter (ADC) comprising:
a continuous-time integrator including:
an amplifier having an amplifier input and an amplifier output,
a capacitor coupled between the amplifier input and the amplifier output, and
a resistor with a first resistor terminal configured to receive an analog input and a second resistor terminal coupled to the amplifier input, the resistor configured to provide a first current for an integration in response to the analog input;
a digital-to-analog converter (DAC) configured to generate a second current at a DAC output based on a digital output of the ADC; and
a switch module comprising:
multiple configurable switch circuits responsive to one or more configuration control signals, with a configuration of the multiple configurable switch circuits providing a summing node; and
a switch circuit having a first switch circuit terminal coupled with the DAC output and a second switch circuit terminal coupled with the amplifier input, with the switch circuit configured to couple the DAC output with the amplifier input for a summation, at the summing node, of the second current with the first current for the integration based on an integration control signal.