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參數(shù)資料
| 型號(hào)： | LA7583 |
| 元件分類： | 接收器 |
| 英文描述： | AUDIO/VIDEO DEMODULATOR, PDIP24 |
| 封裝： | SDIP-24 |
| 文件頁(yè)數(shù)： | 16/16頁(yè) |
| 文件大?。?/td> | 201K |
| 代理商： | LA7583 |
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Continued from preceding page.
Pin
No.
Symbol
Circuit Configuration
Description
10
VCOR
Pin 10 is the pin for connecting the resistor
that determines the impedance of the
oscillation point of the oscillating circuit by
the ceramic oscillator. Oscillation frequency
variations can be reduced by connecting a
resistor with a tolerance of 1% between pin
10 and pin 12.
11
AFT OUTPUT
Pin 11 is the AFT output pin. This pin
determines the gain (control sensitivity:
β
(kHz/mV)) according to the R1 and R2
bleeder resistance values.
β is decreased in
weak electric fields by AGC voltage in order
to reduce malfunction of AFT. R1 and R2
must be 200 k
or less.
AFT curve for medium/
strong electric fields
AFT curve for weak
electric fields
12
VCO2
Pin 12 is the ceramic oscillator (VCO2) pin.
A series resonance-type oscillator is used to
oscillate 1/8 of the IF signal.
Japan = 58.75 MHz
× 1/8
U.S. = 45.75 MHz
× 1/8
Continued on next page.
LA7583
No.5177-9/16
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