Abstract: A data converter including a digital volume control for continuously scaling a received stream of digital audio data by a selected factor and a low noise delta-sigma modulator for re-quantizing a scaled digital data stream output from the digital volume control.

Abstract: A method of amplitude control in a 1-bit digital system includes the step of scaling the stream of 1-bit data by a scaling factor corresponding to a selected output amplitude. The scaled data is modulated and the resulting modulated, scaled data is converted from digital to analog form.

Abstract: Methods and apparatus are provided for receiving DSD data in phase modulation mode using a single clock signal. Either the bit clock or phase signal may be used.

Abstract: A data converter including a digital volume control for continuously scaling a received stream of digital audio data by a selected factor and a low noise delta-sigma modulator for re-quantizing a scaled digital data stream output from the digital volume control.

Abstract: A method of amplitude control in a 1-bit digital system includes the step of scaling the stream of 1-bit data by a scaling factor corresponding to a selected output amplitude. The scaled data is modulated and the resulting modulated, scaled data is converted from digital to analog form.

Abstract: Methods and apparatus are provided for receiving DSD data in phase modulation mode using a single clock signal. Either the bit clock or phase signal may be used.

Abstract: A data converter includes first and second input signal paths receiving an input signal having an input frequency, the first input signal path dividing the input frequency by a first divisor and the second input signal path dividing the input frequency by a second divisor, the second divisor being greater than the first divisor. A selector selects between an output of the first input signal path and an output from the second input signal path in response to a state of a control signal. Control circuitry monitors a selector output signal frequency and a current state of the control signal and selectively resets the state of the control signal to set the selector output frequency to a desired frequency.

Abstract: An analog-to-digital converter is provided for converting multiple analog inputs into corresponding digital values. An output interface circuit uses differential signaling to reduce noise and interference induced in the analog portions of the analog-to-digital converter.

Abstract: A method of amplitude control in a 1-bit digital system includes the step of scaling the stream of 1-bit data by a scaling factor corresponding to a selected output amplitude. The scaled data is modulated and the resulting modulated, scaled data is converted from digital to analog form.

Abstract: An apparatus and method for power digital-to-analog converter protection are implemented. An attenuation value is set in response to the value of the supply voltage. The attenuation value is provided to a gain control, along with the input signal. A gain, offset by the attenuation value, determines the gain-adjusted output signal of the gain control generated from the input signal.

Abstract: A multirate digital-to-analog amplifier system is disclosed. An interpolator is configured to interpolate digital values between samples of a digital signal from a digital signal source, in which the digital signal has a first sample rate. An output signal from the interpolator has a second, predetermined sample rate, which is independent of the first sample rate, of the digital signal. An amplifier is configured to amplify a digital signal having the second sample rate in response to the output signal of the interpolator.

Abstract: Circuitry for selectively sampling a reference voltage with a capacitor 403 includes a first switch 505a for selectively coupling capacitor 403 to a source of a first reference signal during a first operating phase and a second switch 505b for selectively coupling capacitor 403 to a source of a second reference signal during a second operating phase.