CD9088 single-chip electric tuning radio circuit diagram ----- CD9088 RADIO

CD9088 single-chip electric tuning radio circuit diagram, CD9088 RADIO Keywords: CD9088, FM radio circuit diagram CD9088 single-chip electric tuning radio circuit diagram CD9088 RADIO The CD9088 is a single-chip integrated circuit for the electrical tuning micro-small FM radio. It is a 16-foot dual-column flat package. The operating power supply voltage ranges from 1.8 to 5V, and the typical value is 3V. This circuit contains all functions of the FM radio receives the verifier output audio signal from the antenna. The main feature of the CD9088 integrated circuit: The CD9088 circuit is provided with a search tuning circuit, a signal detection circuit, a static noise circuit, and a frequency lock ring (FLL) circuit. The intermediate frequency frequency of the CD9088 circuit is 70kHz, and the peripheral circuit does not have a medium frequency transformer, where the frequency selection is done by the internal RC intermediate frequency filter. In the tuning mode, the CD9088 can use a traditional variable capacitance mechanical tuning, or the electric tuning method can be used as a digital tuning radio. At the time of electric tuning, simply operate the search tuning button (RUN), the circuit automatically searches the station by high-end frequency at the frequency low-end frequency, once the radio signal is searched, and the tuning is automatically stopped. When tuning to the highest end of the FM reception frequency, simply press the reset button (Reset), the local oscillator frequency returns to the lowest end, and the search tuning is restarted. CD9088 electric tuning automatic search FM radio circuit diagram

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