double conversion pulse counting fm tuner
#FM tuner
#pulse counting
#double conversion
#RF receiver
#frequency modulation
#radio circuit
#signal processing
#tuner circuit
#demodulation
#communication
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Methods of frequency modulation
The circuit depicted in figure 2-6 and discussed in previous sections serves illustrative purposes only and is not practical in real-world applications. Nevertheless, the fundamental principle involved—the variation in reactance of an oscillator circuit in response to modulating voltage—represents one...
Superlinear FM (Frequency Modulator)
Designing various electronic circuit systems (synthesizer, modem, decoder, data converter, etc.) often requires a frequency modulator subsystem. An FM modulator is a crucial component in these systems.
An FM modulator is an electronic device that encodes information in a carrier wave...
circuit diagram download
The transmitter's function is to modulate the original signal frequency of the message-carrying signal, a process known as modulation. The circuit realization of this function is referred to as a frequency modulation (FM) circuit. FM tuners are categorized into direct...
Interpolating Scanner Circuit
This design is for an interpolating scanner, a circuit featuring multiple signal inputs, a control voltage input, and a signal output. The output selectively transitions between inputs, smoothly fading from one to the next as the control voltage increases. A...
Superregenerative radio receiver
This is a simple RF receiver primarily designed for low-distance digital radio receiver applications. The analog output of this circuit should be connected to a Schmitt-trigger signal conditioning circuit with an appropriate capacitor value (from the collector of T3). The...
Deviation Meter
A deviation monitor can be constructed by connecting a frequency modulation (FM) detector to an AC voltmeter, calibrating the meter in units of frequency deviation. One method for detecting or demodulating the FM signal is via a phase-locked loop (PLL)....
revamping a vintage yamaha t 80 tuner
Most FM tuners from this era experience two significant issues: a high and reactive output impedance and an unreliable grounding scheme within the unit. This unit originates from a time when single-sided boards were standard, leading to a near-total absence...
General purpose RF receiver
A sensor project that transmits its measurements via a 433 MHz wireless communication link. This document describes the details of a self-built receiver designed to receive data from this sensor. The objective is to create a general-purpose RF receiver module...
Multi Channel Remote Control System
This is a hobby circuit for a multi-channel remote control system that allows the control of eight different appliances. The primary components of this multi-channel remote control circuit are the RF receiver and transmitter. By utilizing this circuit, it is...