參數(shù)資料
型號(hào)： TAS5705PAPG4
廠商： TEXAS INSTRUMENTS INC
元件分類： 音頻／視頻放大
英文描述： 20 W, 2 CHANNEL, AUDIO AMPLIFIER, PQFP64
封裝： 10 X 10 MM, GREEN, PLASTIC, HTQFP-64
文件頁(yè)數(shù)： 32/72頁(yè)
文件大小： 1168K
代理商： TAS5705PAPG4
S
Z
–1
AlphaFilterStructure
w
a
B0265-01
Energy
Filter
a w
,
T,K,O
a
w
a,
a
d
/
,
a
w
DRC1
DRC2
0x3A
0x40,0x41,0x42
0x3B/0x3C
0x3E/0x3F
0x43,0x44,0x45
0x3D
Compression
Control
Attack
and
Decay
Filters
AudioInput
DRCCoefficient
NOTE:
=a
=1 – a
a
w
SLOS549A – JUNE 2008 – REVISED SEPTEMBER 2009 ................................................................................................................................................ www.ti.com
Figure 44. DRC Structure
AM Tuner Interference Management
Digital amplifiers produce AM interference by radio energy emissions near the digital amplifier switching rate and
the harmonics of that switching rate. The digital amplifier emits an interference spectrum in the AM band that is
centered on the second though sixth harmonics of the digital amplifier switching frequency. Because the digital
amplifier switching rate is a multiple of the input data sample rate, the interference frequencies can be changed
by changing the sample rate.
Anatomy of a Receiver
AM receivers are composed of six sections as shown in Figure
The radio-frequency (RF) section has a variable tuner that preselects the frequencies to be received. The RF
section provides only enough filtering to significantly attenuate signals that are significantly above or below the
desired tuned frequency. The RF-section gain is controlled by the AGC to compensate for variations in the signal
strength.
The mixer, variable-frequency oscillator (VFO), and intermediate frequency (IF) sections perform the bulk of the
receiver tuning. In home receivers, the variable oscillator is adjusted so that it is a constant 455 kHz higher than
the desired tuned frequency. The output of the mixer consists of four frequencies, RF, VFO, RF + VFO and RF –
VFO. These signals are then passed into the IF section, where sharp discriminating filters to accept only the
constant 455-kHz (RF – VFO) signal. The resulting signal is amplified and then passed to the detector section,
where it is transformed into an audio signal.
38
Copyright 2008–2009, Texas Instruments Incorporated
Product Folder Link(s): TAS5705
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
TAS5705PAPR 功能描述:音頻放大器 20W stereo Dig Audio Pwr Amp RoHS:否 制造商:STMicroelectronics 產(chǎn)品:General Purpose Audio Amplifiers 輸出類型:Digital 輸出功率: THD + 噪聲: 工作電源電壓:3.3 V 電源電流: 最大功率耗散: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:TQFP-64 封裝:Reel
TAS5705PAPRG4 功能描述:音頻放大器 20W stereo Dig Aud Pwr Amp RoHS:否 制造商:STMicroelectronics 產(chǎn)品:General Purpose Audio Amplifiers 輸出類型:Digital 輸出功率: THD + 噪聲: 工作電源電壓:3.3 V 電源電流: 最大功率耗散: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:TQFP-64 封裝:Reel
TAS5706 制造商:TI 制造商全稱:Texas Instruments 功能描述:20-W Stereo Digital Audio Power Amplifier with EQ and DRC
TAS5706A 制造商:TI 制造商全稱:Texas Instruments 功能描述:20-W Stereo Digital Audio Power Amplifier with EQ and DRC
TAS5706A_0812 制造商:TI 制造商全稱:Texas Instruments 功能描述:20-W Stereo Digital Audio Power Amplifier with EQ and DRC
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