A data acquisition system comprises a signal processing chain including an analog-to-digital converter (ADC) circuit configured to: produce a digital output from an input signal; detect a specified signal feature of the input signal; and change an operating condition of an additional circuit of the signal processing chain in response to detecting the signal feature of the input signal.

A circuit includes an operational amplifier and a resistor network coupled to an output of the operational amplifier. The resistor network includes a first set of resistors coupled between the output of the operational amplifier and a first node of the resistor network, wherein the resistors of the first set are electrically connected in series with each other, a second set of resistors coupled between the first node and a second node of the resistor network, wherein the resistors of the second set are electrically connected in series with each other and include a first number of resistors, a third set of resistors coupled between the second node and a third node of the resistor network, wherein the third node is coupled to a first voltage, and wherein the resistors of the third set are electrically connected in parallel with each other and include a second number of resistors, and a resistor coupled between the first node and the second node and arranged in parallel with the second set of resistors.

A radio-frequency signal preconditioning method includes: receiving, at a radio-frequency signal preconditioning apparatus from an antenna, a radio-frequency signal; selectively providing, at the radio-frequency signal preconditioning apparatus, any of a plurality of gains to the radio-frequency signal to produce an output signal, the plurality of gains spanning a first range; and providing, from the radio-frequency signal preconditioning apparatus, the output signal to a conversion circuit configured to convert the output signal from an analog signal at a radio frequency to a digital signal at a baseband frequency, the conversion circuit having a dynamic range spanning a second range that is smaller than the first range.

The present invention discloses a signal gain tuning circuit having adaptive mechanism. An amplifier receives an analog signal to generate a tuned analog signal to an ADC circuit to further generate a digital signal. A gain control capacitor array and the amplifier together determine a gain of the tuned analog signal. The control circuit receives an actual level of the digital signal to determine an offset of the digital signal and an estimated level to generate a tuning control signal. Each of coarse-tuning capacitors of a coarse-tuning capacitor array corresponds to a first tuning amount relative to a maximal gain. Each of fine-tuning capacitors of a fine-tuning capacitor array corresponds to a second tuning amount relative to the maximal gain. A tuning capacitor enabling combination of the coarse-tuning and fine-tuning capacitor arrays are determined according to the tuning control signal to tune the gain and decrease the offset.

A data acquisition system comprises a signal processing chain including an analog-to-digital converter (ADC) circuit configured to: produce a digital output from an input signal; detect a specified signal feature of the input signal; and change an operating condition of an additional circuit of the signal processing chain in response to detecting the signal feature of the input signal.

A circuit includes an operational amplifier and a resistor network coupled to an output of the operational amplifier. The resistor network includes a first set of resistors coupled between the output of the operational amplifier and a first node of the resistor network, wherein the resistors of the first set are electrically connected in series with each other, a second set of resistors coupled between the first node and a second node of the resistor network, wherein the resistors of the second set are electrically connected in series with each other and include a first number of resistors, a third set of resistors coupled between the second node and a third node of the resistor network, wherein the third node is coupled to a first voltage, and wherein the resistors of the third set are electrically connected in parallel with each other and include a second number of resistors, and a resistor coupled between the first node and the second node and arranged in parallel with the second set of resistors.

Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a receiver device may identify an analog to digital converter (ADC) clipping rate for one or more measurement windows. The receiver device may modify, based at least in part on a determination that the ADC clipping rate does not satisfy a threshold, a low noise amplifier (LNA) gain value to be used by the receiver device. The receiver device may receive a signal using the modified LNA gain value. Numerous other aspects are provided.

The dynamic range and power efficiency of a voice-activated system may be improved by dynamically adjusting the configuration of the voice-activated system's input path. In one embodiment, a first portion of audio may be received through an input path of the voice-activated system having a first configuration. A characteristic of the first portion of audio may be determined and the input path may be adjusted to a second configuration based on the determined characteristic. A second portion of audio may then be received through the input path having the second configuration, and speech analysis may be performed on the second portion of audio.

Method and systems are provided for controlling adjustments of reception functions. Communication links may be setup between a transmitter and a receiver along with sideband control channels. Conditions and/or parameters, affecting estimated performance of reception, via the communication links, at the receiver, may then be monitored at the transmit-side, and information relating to the monitored conditions may then be communicated, via the sideband control channels, to enable adjusting reception related functions at the receiver. The reception related functions comprise analog-to-digital conversion, which may be configured to function in an interleaved manner.

The present invention relates to a device and a method for measurement of electrical signals in an industrial automation and control system. The device comprises an input circuit, configured to receive an electrical input signal (100), scale the electrical input signal by a scaling factor and to set the scaling factor according to a scaling signal (110), an Analog-to-Digital Converter, ADC (220), which is electrically connected to the input circuit, wherein the ADC is configured to convert the scaled electrical input signal (103) into an intermediate digital signal (120), and a first signal path (211), connected to an digital end of the ADC, configured to create the scaling signal (110) and to send the scaling signal (110) to the input circuit, wherein, based on the intermediate digital signal of a sample period and the scaling factor of the sample period, the scaling factor for a subsequent sample period is set.