Datenblatt-Suchmaschine für elektronische Bauteile |
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LA1781M Datenblatt(PDF) 11 Page - Sanyo Semicon Device |
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LA1781M Datenblatt(HTML) 11 Page - Sanyo Semicon Device |
11 / 48 page LA1781M No.6038-11/48 Continued from preceding page. Pin No. Pin function Pin description Equivalent circuit 29 HCC control input The high band frequency output is controlled by a 0 to 1V input. It can also be controlled by the MRC output. Use a resistor of at least 100k Ω when controlling with the pin 32 FM S-meter signal. + 32 1 μF 29 VREF 30 31 Noise canceller input AM/FM detector output Pin 30 is the noise canceller input. The input impedance is 50k Ω. Pin 31 is the AM and FM detector output In FM mode, this is a low-impedance output. In AM mode, the output impedance is 10k Ω. To improve the low band separation, use a coupling capacitor of over 10 μF. 31 30 + AM detector FM detector output VCC VCC 10k Ω 1 μF Noise canceller 50k Ω 4.2V 32 IF S-meter output and MRC DC input FM S-meter output block MRC AC input block Adjust the external 1k Ω resistor to attenuate the MRC AC input and control the circuit. + 32 VCC 10k Ω MRC input 1k Ω 1 μF Continued on next page. |
Ähnliche Teilenummer - LA1781M |
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Ähnliche Beschreibung - LA1781M |
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