Systems and methods are provided for adaptive configuration and control of digital-to-analog converters (DACs). Performance of a plurality of conversion elements in a digital-to-analog converter (DAC) may be assessed based on particular input conditions associated with a digital input to the DAC, and the DAC may be configured based on the assessing of performance. Each conversion element of the plurality of conversion elements handles a particular bit in the digital input. The configuring may comprise selecting a subset of the plurality of conversion elements, and setting only the subset of the plurality of conversion elements to apply a particular type of operations. The particular type of operations pertains to applying digital-to-analog conversions via the DAC, and the particular type of operations relates to or affects performance. The particular input conditions may comprise signal backoff.

Subject matter disclosed herein may relate to correlated electron switch devices, and may relate more particularly to digital to analog conversion using correlated electron switch devices ces.

Subject matter disclosed herein may relate to correlated electron switch devices, and may relate more particularly to digital to analog conversion using correlated electron switch devices ces.

A variable resistor may be coupled between a reference voltage source and components of an integrated circuit to reduce issues relating to thermal noise from a reference voltage signal generated by the reference voltage source. The variable resistor may be set to a low level during a first time period and a high level during a second time period, in which the time periods correspond to a sampling period of a switched-capacitor circuit. The low resistance time period may allow quick settling of an input reference voltage signal, whereas the high resistance time period may reduce a bandwidth of noise on a sampling capacitor coupled to the reference voltage signal. The variable resistor and switched-capacitor network may be used in an analog-to-digital converter (ADC), such as in audio circuits.

A portable audio device may be configured to measure load characteristics of headphones. The device may measure direct current (DC) and/or alternating current (AC) characteristics of the load. These characteristics may be measured by an audio component, such as an audio codec chip or integrated circuit (IC) controller, and reported to software or firmware executing on a processor coupled to the audio component. The software or firmware may then take action based on the measured load characteristics. For example, the load characteristics may be compared to a database of headphones and their known load characteristics to determine a particular headphone model or type of headphone attached to the audio output. The processor may then apply an appropriate equalization curve.

A portable audio device may be configured to measure load characteristics of headphones. The device may measure direct current (DC) and/or alternating current (AC) characteristics of the load. These characteristics may be measured by an audio component, such as an audio codec chip or integrated circuit (IC) controller, and reported to software or firmware executing on a processor coupled to the audio component. The software or firmware may then take action based on the measured load characteristics. For example, the load characteristics may be compared to a database of headphones and their known load characteristics to determine a particular headphone model or type of headphone attached to the audio output. The processor may then apply an appropriate equalization curve.

A DTC (digital-to-time converter) includes: an inverter configured to receive an input clock at an input node and output an output clock at an output node, and a variable source degeneration network controlled by a digital word, wherein the inverter includes a transistor with a gate terminal connected to the input node, a drain terminal coupled to the output node, and a source terminal connected to the variable source degeneration network, and the variable source degeneration network includes a parallel connection of a resistor and a digitally-controlled capacitor of a capacitance controlled by the digital word.

Provided is a fuel injection control device capable of improving detection accuracy of a singular point with respect to a characteristic of the fuel injection valve to be equal to or higher than an original time resolution of the A/D conversion, and capable of accurately detecting the singular point. A variable control part 24 variably controls a conversion timing of the A/D conversion part 221 such that the conversion timing of A/D conversion for physical quantity data related to driving of the fuel injection valve 10 is relatively changed, the A/D conversion part 221 acquires a plurality of time series data by performing A/D conversion on the physical quantity data at a conversion timing before change and at a conversion timing after change by the variable control part 24, and a detection part 223 detects a singular point with respect to the characteristic of the fuel injection valve 10 based on the plurality of time series data.

The present application provides a capacitance sensing circuit, comprising an integrating circuit, comprising an integrating input terminal, coupled to the touch capacitance, wherein the integrating input terminal receives an input voltage; and an integrating output terminal, configured to output an output voltage; a comparator; a positive digital-to-analog (DA) converting unit; a negative DA converting unit; a control circuit, configured to control the positive DA converting unit and the negative DA converting unit; and a logic circuit, configured to output an output code, wherein the output code is related to a capacitance of the touch capacitance.

The present application provides a capacitance sensing circuit, comprising an integrating circuit, comprising an integrating input terminal, coupled to the touch capacitance, wherein the integrating input terminal receives an input voltage; and an integrating output terminal, configured to output an output voltage; a comparator; a positive digital-to-analog (DA) converting unit; a negative DA converting unit; a control circuit, configured to control the positive DA converting unit and the negative DA converting unit; and a logic circuit, configured to output an output code, wherein the output code is related to a capacitance of the touch capacitance.