medium wave modulator 2

This demodulator is designed for the quadrature phase-shift keying (QPSK) modulator previously published by the same author in "Novel Low-Cost QPSK Modulator Needs No Adjustments" (Electronic Design, Sept. 16, 2002, p. 92). Utilizing common CMOS logic, it requires no...

This is a design circuit diagram of a moderate power FM transmitter circuit. The circuit operates using two transistors. It consists of a complete circuit diagram. The operation of this circuit is explained as follows: the voice signals picked...

A Signetics NE602 is utilized in this converter to tune the frequency range of 9.5 to 9.8 MHz. An AM car radio functions as a tunable intermediate frequency (IF) amplifier, with the output being taken from J2, the auto...

Audio light modulations add to the enjoyment of music during functions organised at home or outdoors. Presented here is one such simple circuit in which light is modulated using a small fraction of the audio output from the speaker...

The LA3401 is an MPX integrated circuit designed for FM car stereo applications. It features a non-adjustable voltage-controlled oscillator (VCO), a noise elimination function, and a pilot cancellation function. The device is housed in a 16-pin single in-line package...

The video circuit depicted in Figure 1 integrates an audio-subcarrier notch filter and group-delay equalization in accordance with the ITU-470 standard. It features an amplitude-adjustment capability suitable for driving an RF video modulator in NTSC applications, with minor adjustments...