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參數(shù)資料
| 型號： | BA7746 |
| 廠商： | Rohm CO.,LTD. |
| 英文描述： | VCR Hi-Fi audio signal REC / PB amplifier |
| 中文描述： | 錄像機(jī)高保真的音頻信號錄制/鉛放大器 |
| 文件頁數(shù)： | 11/12頁 |
| 文件大小： | 142K |
| 代理商： | BA7746 |
11
Video ICs
BA7746S / BA7746FS
Operation notes
(1) preamplifier
The preamplifier in this IC is a high-gain amplifier for
FM audio. This amplifier has been carefully designed
for stability. However, the design of the PCB greatly
effects the stability of the preamplifier. A list of general
precautions are given below. Take note when design-
ing the PCB.
1)The oscillation margin is reduced when the input
and output patterns are physically close.
The input and output wiring should not come out of
the same side of tha IC.
Good example
Bad example
2)The GND pattern should be connected at one point
to the main IC GND (pin 16). In addition, the pream-
plifier input-side GND and output-side GND should
be as close as possible to the main IC GND.
Good example
Bad example
3)A large GND pattern under the IC has a shielding
effect, and reduced the chance of picking up exter-
nal noise.
4)When the preamplifier is connected to a capacitive
load such as shilded wire, or when the output cur-
rent is large, the output may oscillate. In this case,
connect a resistor to the preamplifier output (approx.
390
).
IC
Input
Output
PRE
GND
MAIN
GND
IC
R
L
GND
Output
Output
Input
390
REC
PRE
HEAD AMP
660mV
P-P
BA7746S / FS
270mV
P-P
BH780XK series
REC
REC
MOD
MOD
FM
DE
Connection example for BA7746S / BA7746FS and BH780XK series.
Hi-Fi AUDIO
IC
Output
Input
PRE
GND
MAIN
GND
IC
R
L
GND
Output
Output
Input
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PDF描述 |
|---|---|
| BA7755 | High-voltage audio head selection switch |
| BA7757 | Switchless REC / PB amplifier for standard audio signal processing |
| BA7765AS | NORMAL AUDIO SIGNAL PROCESSINGS |
| BA7766AS | NORMAL AUDIO SIGNAL PROCESSINGS |
| BA7767AS | NORMAL AUDIO SIGNAL PROCESSINGS |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| BA7746FS | 制造商:Panasonic Industrial Company 功能描述:IC |
| BA7746S | 制造商:ROHM 制造商全稱:Rohm 功能描述:VCR Hi-Fi audio signal REC / PB amplifier |
| BA7746S/FS | 制造商:ROHM 制造商全稱:Rohm 功能描述:Video LSIs |
| BA7750AL | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Consumer IC |
| BA7751AFS | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Consumer IC |
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