参数资料
型号: TLV1018-25YDCR
厂商: TEXAS INSTRUMENTS INC
元件分类: 音频/视频放大
英文描述: 1 CHANNEL, AUDIO AMPLIFIER, PBGA4
封装: GREEN, DSBGA-4
文件页数: 12/12页
文件大小: 615K
代理商: TLV1018-25YDCR
External Pre-Amplifier Application
V
CC
OUTPUT
INPUT
GND
V
OUT
2.2 F
2.2 kW
GND
JFET
Microphone
V
CC
www.ti.com .......................................................................................................................................... SLVS664A – OCTOBER 2008 – REVISED NOVEMBER 2008
The TLV1018 can also be used outside of an ECM as a space saving external preamplifier. In this application,
the TLV1018 follows a phantom biased JFET microphone in the circuit. This is shown in Figure 6. The input of
the TLV1018 is connected to the microphone via the 2.2-
F capacitor. The advantage of this circuit over one with
only a JFET microphone are the additional gain and the high-pass filter supplied by the TLV1018. The high-pass
filter makes the output signal more robust and less sensitive to low frequency disturbances. In this configuration,
the TLV1018 should be placed as close as possible to the microphone.
Figure 6. External Preamplifier
Copyright 2008, Texas Instruments Incorporated
9
Product Folder Link(s): TLV1018
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