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參數資料

The following figure illustrates one possible circuit design using both the IF count buffer and the SD output circuit.

Noise Canceller Block

The resistor and capacitor connected to pin 6 determine

the noise canceller sensitivity.

The resistor and capacitor connected to pin 7 determine

the noise AGC.

Pin 9 is the gate trigger output. The resistor and capacitor

connected to pin 9 determine the length of time that the

gate is open.

The resistor and capacitor connected to pins 10 and 11 are

for holding the input signal level when the noise canceller

gate operates. The storage time depends on the time that

the gate is open. The time constant for the RC circuit on

pins 10 and 11 must, therefore, be such that the output

retention signal level does not drop during this interval.

Pin 26 is the noise canceller input. An appropriate input level is 250 mVrms for 100% dev and fm = 1 kHz. Excessive input

can exceed the noise canceller dynamic range, increasing the THD. Insufficient input, on the other hand, lowers the

signal-to-noise ratio and reduces pilot lamp sensitivity.

IF count buffer output

Apply 5 V for seek

SD output

Noise canceller input waveform

Noise canceller output waveform

Output retention

(storage)

LA1862M

No. 4092- 15/27

相關PDF資料	PDF描述
LA1863M	1-BAND, AUDIO TUNER, PQFP44
LA1867NM	AM/FM, AUDIO DEMODULATOR, PQFP44
LA1875M	AM/FM, AUDIO SINGLE CHIP RECEIVER, PDSO36
LA1875M	AM/FM, AUDIO SINGLE CHIP RECEIVER, PDSO36
LA1883M	AM/FM, AUDIO SINGLE CHIP RECEIVER, PQFP64

相關代理商/技術參數	參數描述
LA1867NM	制造商:SANYO 制造商全稱:Sanyo Semicon Device 功能描述:Car Radio Single-Chip Tuner System
LA1867NM-MPB-E	制造商:ON Semiconductor 功能描述:
LA186B-9SEF9UG-3-PF	制造商:LIGITEK 制造商全稱:LIGITEK electronics co., ltd. 功能描述:LED ARRAY
LA186B-9SEF-PF	制造商:LIGITEK 制造商全稱:LIGITEK electronics co., ltd. 功能描述:LED ARRAY
LA186B-DBK-2-PF	制造商:LIGITEK 制造商全稱:LIGITEK electronics co., ltd. 功能描述:LED ARRAY

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