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    Untitled

    Abstract: No abstract text available
    Text: M-9220 3V/5V General Purpose Call Progress Tone Detector General Description Applications • Autom atic Dialers The Teltone M-9220 is an integrated circuit tone detector for general purpose use in automatic following of switched telephone calls. The circuit uses low power C M O S tech­


    OCR Scan     		PDF M-9220 M-9220 M-9220-01P 22121-20th aT3E44S DDD23S4

    Teltone M-957

    Abstract: MC144100 M-957-02 M957 Teltone M957 MC14410 M-957-01 digital voltmeter with 8051 22-PIN VNA-22
    Text: DTMF RECEIVERS & TRANSCEIVERS ÏC E L X O N E Jläl& ffiii M-957 DTMF Receiver The Teltone M-957 see Figure 1 combines switched-capacitor and digital frequency measuring techniques to decode Dual-Tone Multifrequency (DTMF) signals to four-bit binary data. Dial tone rejection and 60-Hz noise rejection filters are


    OCR Scan     		PDF M-957 M-957 60-Hz 22-pin 24-pin M-957-01 5-through-12-volt M-957-02 58-MHz Teltone M-957 MC144100 M957 Teltone M957 MC14410 digital voltmeter with 8051 VNA-22