Finally, there's frequency modulation (FM). FM is similar to AM, but the frequency of the carrier is modulated rather than the amplitude, producing a sound that's rich with additional harmonics not ...

A novel full-wave rectifier turns an audio power amplifier into a simple modulator, that is then used to modulate an ...

PSK is another modulation scheme that maps information symbols onto a transmitted carrier signal. With this scheme, however, the symbols are distributed onto a constellation that forms a circle, i.e., ...

Common digital modulation techniques include amplitude-shift keying (ASK), frequency-shift keying (FSK), and phase-shift keying (PSK). ASK is the simplest of these techniques, and is used for low ...

Envelope tracking technology is a well-known method of improving the efficiency of RF amplifiers operating with rapidly varying signal amplitude. The voltage source in an envelope tracking system is ...

AM1 generates short optical pulses thanks to an AWG. Very short optical pulses from 70ps can be achieved at 850nm, 1310nm and 1550nm respectively using the NIR-MX800, MXER1300 and MXER high contrast ...

The web is filled with introductions to Delta Sigma modulation (also sometimes referred to as Sigma Delta modulation) in the context of Delta Sigma converters. Unfortunately, the ones I’ve ...

Potentiometer R7 adjusts the output amplitude as required by the modulator in use. The notch frequency is set by L2 and C2, and the notch depth and bandwidth are set by R4, R5, and R6.

Nature 427, 615–618 (2004) Article ADS CAS PubMed Google Scholar Liao, L. et al. High speed silicon Mach-Zehnder modulator. Opt. Express 13, 3129–3135 (2005) Article ADS CAS PubMed Google Scholar ...