Back to results
US 2016/0112795 A1Published application
Very high dynamic-range switched capacitor adc with large input impedance for applications tolerating increased distortion and noise at large input signal levels
AssigneeInfineon Technologies AG
InventorsElmar Bach, Patrizia Greco, Snezana Stojanovic, Dietmar Straeussnigg
Life of this patent
Estimating the term…
Abstract
A modulator is configured to respond to input swings by providing a feedback voltage via a feedback path to compromise an increase in noise and distortion power with increasing signal power at signal levels exceeding a predetermined threshold. A digital-to-analog converter (DAC) generates a feedback voltage with a resistor string biased with a given current and switches as a function of an input value to mitigate the voltage swing at a summing node.
Claims25
A modulator comprising:
- an analog input configured to receive an analog input voltage;
- a modulator path, comprising a modulated digital output, configured to generate a modulated digital output signal at the modulator digital output;
- and
- a feedback path, coupled to the modulated digital output, comprising a digital-to-analog converter configured to generate a floating voltage as a function of the modulated digital output signal.
1 more element
An audio system comprising:
- an analog input configured to receive an analog input voltage;
- a modulator component, comprising a modulated digital output, configured to generate the modulated digital output;
- and
- a feedback component, coupled to the modulated digital output, comprising a digital to analog converter configured to generate a floating voltage and moderate a voltage swing from the analog input voltage at the analog input to the modulator path with the floating voltage.
1 more element
A method comprising:
- receiving, at an analog input of a modulator, an analog signal derived from a sensor;
- modulating the analog signal in a modulator path to generate a digital output signal at a digital output;
- generating a floating voltage via a digital to analog converter in a feedback path to the modulator path as a function of the digital output;
- and
- modifying the floating voltage generated by the digital to analog converter in response to a change in a summing signal of a summing node coupled to the modulator path.
2 more elements
Dependencies are inferred from the claim text.