If we replace the potentiometer VR1 with an AC signal plus DC bias signal in any of the previous Figures 3 to 17, the voltage controlled attenuators can become an amplitude modulator circuit instead.

Conceptually the circuit there is simple, consisting of the ultrasonic receiver, followed by a transistor amplifier for the modulated wave, then a diode for demodulation, another transistor ...

The main features are built-in signal modulation and demodulation at many frequencies in parallel, PLLS, amplitude control, and PID controllers. The two 50 MHz low-noise signal input and output pairs ...

He’s broken down the modulation and demodulation circuits into their basic op-amp stages with examples of what the signal should look like on a scope after each stage. That’s the beauty here.

• Providing an interferometric optical modulator which can be utilized as a digital photonic clock circuit, a pulse width/amplitude modulator circuit, and a bi-stable optical-memory cell circuit. • ...

The resulting time-varying frequency, and thus varying phase of the vision carrier, is known as incidental phase modulation, ICPM. There are two basic types of circuits for demodulating ...

The DVB-S2/S Demodulator IP core is a silicon-proven IP core extracted from Production chips. It contains tuner Rx gain control which makes PDM Demodulator a high performance (A)PSK output ... The DVB ...

Like the modulator, this circuit runs for a carrier frequency of f m /8. It has been tested at 2 MHz (with basic CMOS logic) and at 20 MHz (with HCMOS).