TUA6020 Stationary - MOPLL & Silicon Tuner 2 Band TV Tuner Mixer-Oscillator-PLL With Balanced IF-Amplifier
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Micro mixer circuit by TA7137
A micro mixer circuit is designed to be simple, affordable, compact, and versatile. This circuit can mix up to four input channels, including microphone signals, FM tuners, AUX, and other signals, as illustrated in Figure 1. The operation begins with...
VHF/UHF TV Modulator
A simple oscillator generates a frequency in the VHF or UHF range. This oscillator is modulated with a video signal, and the resulting modulated carrier wave is transmitted to the TV set's aerial input through a cable. The final step...
why doesnt this circuit oscillate
The buba oscillator initially failed to oscillate. The first step is to check the fundamental components, as minor errors in the values of capacitors, resistors, and inductors can significantly impact performance. It is advisable to measure component values with a...
Metal detector 8
This example describes a metal detector that employs a PLL (phase-locked loop) digital integrated circuit, the MCl4046. It emits an alarm signal upon detecting metal objects and can identify the type of detected material based on the current meter's readings....
Using the MC145158 PLL Frequency Synthesizer
The Motorola MC145158 is a dual-modulus, serial-input PLL frequency synthesizer commonly utilized in older Motorola cellular phones. For detailed technical specifications, refer to the MC145158 datasheet. Although the MC145158 is no longer in production, it can occasionally be found in...
Basic RF Oscillator circuit diagram
Experimenting with the size of the coil and the number of turns can influence the frequency and signal output of the oscillator. The signal can be received using a standard FM radio receiver. The input signal should be coupled via...
SAA1057 PLL Synthesized FM Transmitter
The operation of the circuit is managed by a microcontroller from MICROCHIP, specifically the PIC16F84. This microcontroller supports buttons and a 2-line, 16-character LCD display, along with the PLL circuit SAA1057. The voltage-controlled oscillator (VCO) is implemented using transistor Q8,...
Radio harmonic detection circuit
The demodulation and detection circuit is a radio AM intermediate frequency (IF) signal amplifier that performs two-stage detection using diode Dr. It extracts the audio signal from the IF carrier detection and subsequently sends it to the power amplifier stage....
Limited TV channels to increase reception circuit
The circuit utilizes two main components: an integrated electronic tuner with AV output, commonly referred to as the tuner, which can receive CATV full channel TV signals and output a video signal (Vttko) along with an audio signal (Audio). The...