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    Da Harlequin Gal
    CD2003 is an integrated circuit used in AM/FM radios. It contains circuits for AM/FM amplification, mixing, intermediate frequency amplification, and detection. The circuit uses a 16-pin dual-in-line package and operates on 3V. It receives AM signals through pin 16 and FM signals through pin 1. The signals are mixed with a local oscillator signal and output at 465kHz for AM and 10.7MHz for FM. The output is provided on pin 11 to send to subsequent circuits in the radio.

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    Nota

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    Da Harlequin Gal
    81 views2 pages
    CD2003 is an integrated circuit used in AM/FM radios. It contains circuits for AM/FM amplification, mixing, intermediate frequency amplification, and detection. The circuit uses a 16-pin dual-in-line package and operates on 3V. It receives AM signals through pin 16 and FM signals through pin 1. The signals are mixed with a local oscillator signal and output at 465kHz for AM and 10.7MHz for FM. The output is provided on pin 11 to send to subsequent circuits in the radio.

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    CD2003 is an integrated circuit used in AM/FM radios. It contains circuits for AM/FM amplification, mixing, intermediate frequency amplification, and detection. The circuit uses a 16-pin dual-in-line package and operates on 3V. It receives AM signals through pin 16 and FM signals through pin 1. The signals are mixed with a local oscillator signal and output at 465kHz for AM and 10.7MHz for FM. The output is provided on pin 11 to send to subsequent circuits in the radio.

    Copyright:

    © All Rights Reserved
    Download as DOCX, PDF, TXT or read online from Scribd
    Download as docx, pdf, or txt
    81 views2 pages

    Nota

    Uploaded by

    Da Harlequin Gal
    CD2003 is an integrated circuit used in AM/FM radios. It contains circuits for AM/FM amplification, mixing, intermediate frequency amplification, and detection. The circuit uses a 16-pin dual-in-line package and operates on 3V. It receives AM signals through pin 16 and FM signals through pin 1. The signals are mixed with a local oscillator signal and output at 465kHz for AM and 10.7MHz for FM. The output is provided on pin 11 to send to subsequent circuits in the radio.

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    © All Rights Reserved
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    CD2003 is an AM / FM radio monolithic integrated circuitit has been widely

    used in the desheng series radio.1. Features CD2003 integrated circuit contains
    AM HF amplifier, local oscillator, mixer, IF amplifier and detector circuit ;FM HF
    amplifier, local oscillator, mixer, IF amplifier and discriminator circuit : and the
    AGC circuit, AM / FM band selection circuit etc, the block diagram of the in-circuit
    is shown in Figure 1. Figure 1 CD2003 integrated circuit within the circuit block

    diagram and typical application circuit2.pin functions and data CD2003


    integrated circuit uses 16-pin dual in-line Package,the pin functions and typical
    operating parameters(Vcc = 3V time, the pin voltage in AM and FM both cases,)
    are listed in table 1,the pin function and the test data on the desheng multi-band
    radio are listed in the table 2. Table 1 CD2003 integrated circuit pin functions and
    typical operating parameters Table 2 CD2003 integrated circuit pin functions and
    test data on the desheng multi-band radio 3.Typical application circuit Illustration
    1 is a typical application circuit of AM / FM band radio formed by the CD2003
    integrated circuit.the work process1) AM band.The signals received from Antenna
    input from the CD2003 (16) pin ,mixing with the LO signal in the mixing
    circuit.The signal obtained output from (4) pin , obtaining the 465kHz IF signal
    selected by frequency to input from the (7) pin.After being converted by the IF
    amplification, detection, electronic switch, the signals output from (11) pin to
    reach the post-stage circuit. (2)FM band.The signals received from Antenna input
    from the (1) pin after being band-pass filtered by the BPF,added to the mixing
    circuit after HF amplifier.Mixing with the LO signal in the mixing circuit,the signal
    obtained output from (3) pin , obtaining the 10.7MHz IF signal selected by
    frequency to input from the (8) pin.After being converted by the AM / FM
    electronic switch, the signals output from (11) pin to reach the post-stage
    circuit.Tip:According to the above-mentioned signal flow ,it's convenient to repair
    AM or FM radio with sound or radio trouble. Because CD2003 will not easily
    damaged,we should pay attention to the periphery of its three-terminal filters to
    be checked.

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