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| 型號(hào)： | TK14584 |
| 廠商： | TOKO Inc. |
| 英文描述： | FM IF IC |
| 中文描述： | 調(diào)頻中頻集成電路 |
| 文件頁數(shù)： | 13/20頁 |
| 文件大?。?/td> | 196K |
| 代理商： | TK14584 |
January 2000 TOKO, Inc.
Page 13
TK14584
G
R
I
D
D
A
I
D
D
N
P
V
+
-
GND
AMP
VCC
IF Limiter Amplifier, RSSI:
The IF limiter amplifier is composed of five differential gain stages. The total gain of the IF limiter amplifier is 80 dB. The
output signal of the IF limiter amplifier is provided at Pin 10 through the emitter-follower output stage. The IF limiter amplifier
output level is 0.5 V
P-P
.
The input resistance of the IF limiter amplifier is 1.8 k
(see Figure 1A). If the impedance of the filter is lower than 1.8
k
, connect an external resistor between Pin 1 and Pin 2 in parallel to provide the equivalent load impedance of the filter.
Figure 1A shows the case that the impedance of the filter is 330
.
The operating current of the emitter-follower of the IF limiter amplifier output is 200
μ
A. If the capacitive load is large, the
negative half cycle of the output waveform may be distorted. This distortion can be reduced by connecting an external
resistor between Pin 10 to GND to increase the operating current. The increased operating current from an external resistor
is calculated as follows (see Figure 1B):
The increased operating current I
e
(mA) = (V
CC
- 1.0) / R
e
(k
)
330
1.8 K
FIGURE 1A
VCC
Ie
2
IF OUTPUT
Re
100 k
FIGURE 1B
CIRCUIT DESCRIPTION
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| TK14584M | FM IF IC |
| TK14584MTL | FM IF IC |
| TK14588 | FM IF IC |
| TK14588V | FM IF IC |
| TK14588VTL | FM IF IC |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| TK14584M | 制造商:TOKO 制造商全稱:TOKO, Inc 功能描述:FM IF IC |
| TK14584M/584 | 制造商:TOKO 制造商全稱:TOKO, Inc 功能描述:FM IF IC |
| TK14584MTL | 制造商:TOKO 制造商全稱:TOKO, Inc 功能描述:FM IF IC |
| TK14588 | 制造商:TOKO 制造商全稱:TOKO, Inc 功能描述:FM IF IC |
| TK14588V | 制造商:TOKO 制造商全稱:TOKO, Inc 功能描述:FM IF IC |
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