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參數(shù)資料
| 型號： | LM3189 |
| 廠商： | National Semiconductor Corporation |
| 英文描述： | LM3189 FM IF System |
| 中文描述： | LM3189調(diào)頻中頻系統(tǒng) |
| 文件頁數(shù)： | 1/8頁 |
| 文件大小： | 210K |
| 代理商： | LM3189 |
TL/H/7960
L
April 1987
LM3189 FM IF System
General Description
The LM3189N is a monolithic integrated circuit that provides
all the functions of a comprehensive FM IF system. The
block diagram of the LM3189N includes a three stage FM IF
amplifier/limiter configuration with level detectors for each
stage, a doubly balanced quadrature FM detector and an
audio amplifier that features the optional use of a muting
(squelch) circuit.
The advanced circuit design of the IF system includes desir-
able deluxe features such as programmable delayed AGC
for the RF tuner, an AFC drive circuit, and an output signal
to drive a tuning meter and/or provide stereo switching log-
ic. In addition, internal power supply regulators maintain a
nearly constant current drain over the voltage supply range
of
a
8.5V to
a
16V.
The LM3189N is ideal for high fidelity operation. Distortion
in an LM3189N FM IF system is primarily a function of the
phase linearity characteristic of the outboard detector coil.
The LM3189N has all the features of the LM3089N plus
additions.
The LM3189N utilizes the 16-lead dual-in-line plastic pack-
age and can operate over the ambient temperature range of
b
40
§
C to
a
85
§
C.
Features
Y
Exceptional limiting sensitivity: 12
m
V typ at
b
3 dB
point
Y
Low distortion: 0.1% typ (with double-tuned coil)
Y
Single-coil tuning capability
Y
Improved (S
a
N)/N ratio
Y
Externally programmable recovered audio level
Y
Provides specific signal for control of inter-channel mut-
ing (squelch)
Y
Provides specific signal for direct drive of a tuning me-
ter
Y
On channel step for search control
Y
Provides programmable AGC voltage for RF amplifier
Y
Provides a specific circuit for flexible audio output
Y
Internal supply voltage regulators
Y
Externally programmable ON channel step width, and
deviation at which muting occurs
Block Diagram
TL/H/7960–1
All resistance values are in
X
*
L tunes with 100 pF (C) at 10.7 MHz, Q
0
j
75
(Toko No. KACS K586HM or equivalent)
C
1995 National Semiconductor Corporation
RRD-B30M115/Printed in U. S. A.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LM3189N | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:LM3189 FM IF System |
| LM318D | 功能描述:運算放大器 - 運放 Single High Speed RoHS:否 制造商:STMicroelectronics 通道數(shù)量:4 共模抑制比（最小值）:63 dB 輸入補償電壓:1 mV 輸入偏流（最大值）:10 pA 工作電源電壓:2.7 V to 5.5 V 安裝風格:SMD/SMT 封裝 / 箱體:QFN-16 轉(zhuǎn)換速度:0.89 V/us 關(guān)閉:No 輸出電流:55 mA 最大工作溫度:+ 125 C 封裝:Reel |
| LM318-D08-T | 制造商:UTC-IC 制造商全稱:UTC-IC 功能描述:HIGH SPEED OPERATIONAL AMPLIFIER |
| LM318DE4 | 功能描述:運算放大器 - 運放 Single High-Speed Op Amp RoHS:否 制造商:STMicroelectronics 通道數(shù)量:4 共模抑制比（最小值）:63 dB 輸入補償電壓:1 mV 輸入偏流（最大值）:10 pA 工作電源電壓:2.7 V to 5.5 V 安裝風格:SMD/SMT 封裝 / 箱體:QFN-16 轉(zhuǎn)換速度:0.89 V/us 關(guān)閉:No 輸出電流:55 mA 最大工作溫度:+ 125 C 封裝:Reel |
| LM318DG | 制造商:Texas Instruments 功能描述: |
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