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參數(shù)資料
| 型號(hào)： | LA7583 |
| 廠(chǎng)商： | Sanyo Electric Co.,Ltd. |
| 英文描述： | IF Signal Processing Circuit (A 2 C PLL VIF + SIF) for TVs and VCRs(用于電視機(jī)/VCR應(yīng)用的IF信號(hào)處理（自動(dòng)調(diào)整控制 鎖相環(huán) VIF+SIF）電路) |
| 中文描述： | 中頻信號(hào)處理電路（2葷鎖相環(huán)資料表格應(yīng)力強(qiáng)度因子）的電視和錄像機(jī)（用于電視機(jī)/錄像機(jī)應(yīng)用的中頻信號(hào)處理（自動(dòng)調(diào)整控制鎖相環(huán)資料表格強(qiáng)度因子）電路） |
| 文件頁(yè)數(shù)： | 8/16頁(yè) |
| 文件大?。?/td> | 200K |
| 代理商： | LA7583 |
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Continued from preceding page.
Pin
No.
4
Symbol
Circuit Configuration
Description
IF AGC
Pin 4 is the 1st IFAGC filter pin. This filter
smoothes out the peaks detected in the
signal by the AGC detector, and generates
the AGC voltage. The 2nd AGC filter (lag
lead filter) is built in using filter technology.
The cutoff frequency is approximately
500 Hz.
.
AGC filter constants and AGC speed
Medium-speed AGC: R1 = 330 k
C1 = 0.1 μF
R1 = 470 k
C1 = 0.056 μF
High-speed AGC:
5
6
VIF INPUT
Pins 5 and 6 are the VIF amplifier input
pins. The VIF amplifier has three stages,
each of which uses a C cut, so when used
in conjunction with a SAW filter, DC cut by a
capacitor becomes unnecessary.
Ri = 1.1 k
Ci = 3 pF
9
1st SIF INPUT
Pin 9 is the 1st SIF input pin. Input is such
that DC cut must be performed using a
capacitor. When a SAW filter, etc. is used in
the input circuit, an L that is used to
neutralize the SAW filter output capacitance
and the IC input capacitance serves to
improve the 1st SIF sensitivity.
Continued on next page.
LA7583
No.5177-8/16
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