Low power current integration DAC ramp settling assist circuit
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United States of America
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Mar 11, 2025
Grant Date -
Oct 19, 2023
app pub date -
Apr 13, 2022
filing date -
Apr 13, 2022
priority date (Note) -
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Abstract
A ramp generator includes an operational amplifier having an output to generate a ramp signal. An integration current source is coupled to a first input and a reference voltage is coupled to a second input of the operational amplifier. A feedback capacitor and a reset switch are coupled between the first input and the output of the operational amplifier. The reset switch is turned on to reset the ramp generator. A ramp event is configured to be generated in the ramp signal at the output of the operational amplifier in response to the reset switch being turned off. An assist current source is coupled between the output of the operational amplifier and ground. The assist current source is configured to conduct an assist current from the output of the operational amplifier to ground in response to the reset switch being turned off.
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