CD2003 DATASHEET PDF

Dasida C16 couples the inverting inputs of the audio amplifiers together for AC signals. According to the circuit they are connected to Fm Out and Fm In, so it much be some kind of filter. Sign up using Email and Password. Print this Page Comments Reading 3. January 8, at datxsheet Maybe the potmeter is not a logarithmic one like you would normally use for audio.

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Fenritaxe Super cheap from numerous sellers on eBay and dd controllable to boot! Note how at CF1 C ermic F ilter it says: I think here this resonator is used as a filter for the detector output, see the CD datasheet.

Becauce CD will not easily damaged,we should pay attention to the periphery of its three-terminal filters to be checked. One of the op-amp output is connected to one side of the speaker and other output to other side. Gives realtime channel strength and transmission quality values too over serial. Not how R6 is 10 k dataeheet the potmeter is 50 k. It reduces the gain of that stage but improves linearity and bandwidth. R6 has probably to do with the volume adjust. C16 couples the inverting inputs of the audio amplifiers together for AC signals.

This SAW filter is already a filter by itself in one component. The signals received from Antenna input from the CD 16 pin ,mixing with the LO signal in the mixing circuit. Table 1 CD integrated circuit pin functions and typical operating parameters Table 2 CD integrated circuit pin functions and test data on the desheng multi-band radio 3. To evaluate my Code: Post as a guest Name.

I think it operates in the same way as a SAW filter. Gave it a minimalist switch to toggle the channels stored in an array. Learned few cc things, and got some questions, especially the output stage. I am working on a simple FM radio receiver. CF2 2 pins can be either a crystal or a ceramic resonator.

Same thing different names. Maybe the potmeter is not a logarithmic one like you would normally use for audio. May 19, at 7: After being converted by the IF amplification, detection, electronic switch, the signals output from 11 pin to reach the post-stage circuit.

Yet another link to a project which uses unobtainable or at least difficult to source components. Exactly the same way as when using feedback with an opamp. Strange op-amp circuit FM radio Ask Question. CF2 may be a phase shifter required for the quadrature detector FM demodulator — a kind of ceramic filter but optimised for linear phase across the IF passband.

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