Desheng 119 700 High sensitivity l2-band stereo radio circuit diagram
The Desheng 119 700 type radio circuit is designed to receive various frequency bands including FM, medium wave (MW), and short wave (SW) signals. The high sensitivity of the circuit allows for effective reception of weak signals, making it suitable for diverse broadcasting environments. The L2-band stereo functionality enhances the audio output quality by providing a richer sound experience.
Key components of the circuit include an RF amplifier, which boosts the incoming radio frequency signals, and a mixer stage that combines the RF signal with a local oscillator signal to produce an intermediate frequency (IF). The IF signal is then processed through several stages of amplification and filtering to isolate the desired audio signal.
The demodulation stage is crucial for extracting the audio information from the modulated carrier wave. In FM applications, a frequency discriminator is typically employed to convert frequency variations into amplitude variations that can be amplified and sent to the audio output stage.
For stereo functionality, the circuit features a dedicated audio processing unit that separates the left and right audio channels, ensuring a true stereo experience. This is achieved through the use of operational amplifiers and additional filtering to maintain audio fidelity.
Power supply considerations are also significant in this design; the circuit may require a regulated power supply to ensure stable operation across the various frequency bands. Additionally, adequate bypass capacitors should be included to minimize noise and improve overall performance.
Overall, the Desheng 119 700 type radio circuit diagram represents a comprehensive approach to multi-band reception, combining high sensitivity with stereo output capabilities, suitable for both amateur and professional audio applications.Desheng 119 700 type FM, TV sound, medium wave, short wave high sensitivity l2-band stereo radio circuit diagram as follows:
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