Posts Tagged ‘fm receiver’

Simple FM Receiver Pocket FM Radio by BF184

It is a pocket receiver that I built. The idea was to use a simple receiver, but can be used to escape to 3 times viewed. My previous 6-transistor receiver was more complicated and requires 12 volts. This means that 10 AA batteries. I designed and built acircuit board, and built a small aluminum box will hold Comact as possible.

There is nothing wrong with this design. The detector has a simple Colpitts oscillator is of a type often used in other receptor super-regeneration. It’s natural for yourself. The sensitivity for this type of detector is relatively low, but it’s simple and easy to get work. As always, gave me a feedback control to determine the optimum point of operation, ie. maximum sensitivity and minimum SCA / stereo subcarrier beat.

Source : http://www.stardi.com/simple-fm-receiver-pocket-fm-radio-circuit-main-bf184-transistor/

Related Links
Pocket FM Radio circuit
FM Receiver
FM Receivers by TL431 – 2N4416
FM Radio by LA1800
Simple FM Receiver by TDA7000
FM Receiver 4 Transistor by BF184

FM IF Subsystem with CA3189E

TheCA3189E is a comprehensive FM-IF system designed for high fidelity FM tuners. It includes a three stage FM-IF amplifier/limiter configuration with level detectors for each stage, a double-balanced quadrature FM detector and an audio amplifier that features the optional use of a muting circuit. The advanced circuit design includes desirable special features such as delayed AGC for the RF tuner, an AFC drive circuit, and an output signal to drive a tuning meter and/or provide stereo switching logic. In addition, internal power supply regulators maintain a nearly constant current drain over the voltage supply range of +8V to +16V. Distortion is primary a function of the phase linearity characteristics of the external detector coil.

Source: http://www.next.gr/inside-circuits/
FM-IF-Subsystem-with-CA3189E-l5864.html

FM radio with TDA7000

An FM radio on a single chip requiring only a few simple peripheral components. In particular the ship requires only one simple coil and alignment is very easy. The chip includes an RF input stage, mixer, local oscillator, IF amplifier/limiter, phase demodulator, mute detector and mute switch. The output will directly drive a crystal earpiece or could be used with a TBA820M to form a complete portable radio.

Read more :http://www.next.gr/inside-circuits/
FM-radio-with-TDA7000-l5881.html