An analog filter removes the high-frequency distortion that's generated in the resulting square wave, and the result—thanks to Nyquist again—is the original signal in analog form.

To convert from analog to digital, the analog signal first is sampled at a carrier frequency. For a given sample period, the area under the analog signal equals the area under the PWM pulse.

For AC signals above the audio range, you may need a microcontroller that contains an SAR (successive-approximation register) ADC, which can sample at rates of 1 Msample/s (see “ Inside an SAR-type ...

Analog-to-digital converters (ADCs) used in analog-signal measurement systems may experience multiple inaccuracies, which lead to errors in those systems. Understanding how this happens can help ...

Addressing a major roadblock in next-generation photonic computing and signal processing systems, researchers at the Harvard John A. Paulson School of Engineering and Applied Sciences (SEAS) have ...

Synthetic biologists have added high-precision analog-to-digital signal processing to the genetic circuitry of living cells. The research, described online today in the journal Science ...

Analog Devices is aiming at low-power signal measurement with a combined synchronous demodulator and filter chip which allows precision magnitude and phase measurements to be made on analogue signals ...

Other examples include machine control, where the converter can combine several analog signals into a single Modbus address to enable Web viewing of data and SCADA systems, to report and record ...