參數(shù)資料
型號(hào)： TDA9615
廠商： NXP Semiconductors N.V.
英文描述： DIODE,TVS,BI,20V,1500W,J-LEAD
中文描述： 音頻處理器錄影帶高保真
文件頁(yè)數(shù)： 31/44頁(yè)
文件大?。?/td> 263K
代理商： TDA9615
1997 Jun 16
31
Philips Semiconductors
Preliminary specification
Audio processor for VHS hi-fi
TDA9615H
After a calibration in ‘NTSC’ or ‘PAL’ mode the oscillators
and band-pass filters can be switched between NTSC and
PAL system frequencies without the need for additional
calibration. Switching between these system modes is
executed immediately and can be done in any operational
mode. Frequency accuracy of switching is 100 kHz
±
3 kHz
for both carriers. For ‘record’ mode however it is advised
to use re-calibration after system switching; this to obtain
the best possible frequency accuracy. A new
auto-calibration can be started by first resetting bit CALS
to logic 0 followed by setting bit CALS to logic 1 again.
Envelope output;
see Figs 8 to 11
ENVOUT (pin 39) is an analog output for stereo audio level
(e.g. level meter display) and for ‘playback’ mode FM
carrier level (e.g. auto-tracking). At the microcontroller only
one A/D converter input is needed for reading of all
necessary information. During ‘playback’ mode I
2
C-bus
bit EOS offers selection between audio or carrier level
information. Audio level information is always output
during ‘loop-through’ mode and ‘record’ mode however
now EOS offers a fixed selection of hi-fi stereo (i.e.
independent of the ‘Output Select’ mode setting); helpful
when audio level information is used by the microcontroller
for controlling the hi-fi record volume.
Table 35
Envelope output select
AFM
EOS
ENVELOPE OUTPUT
FUNCTIONAL USE
0 (playback mode)
0 (playback mode)
1 (record mode/
loop-through mode)
1 (record mode/
loop-through mode)
0
1
0
AF envelope of output select
HF envelope
AF envelope of output select
level meter display
auto-tracking or manual tracking display
level meter display
1
AF envelope of hi-fi stereo
record volume control (and level display)
Audio envelope uses time multiplexing to output both left
and right channel audio level. A peak hold function and
dynamic range compression (square root function) are
included for easy read-out. The peak hold function as well
as left and right channel multiplexing is controlled by the
HID input signal (pin 40).
The HF envelope output signal is continuous and derived
from the left channel carrier. HF envelope shows a
logarithmic characteristic.
相關(guān)PDF資料
PDF描述
TDA9615H Audio processor for VHS hi-fi(應(yīng)用于VHS高保真的音頻處理器)
TDA9811 Multistandard VIF-PLL with QSS-IFand AM demodulator(帶QSS-IF和AM解調(diào)器的多標(biāo)準(zhǔn)的VIF-PLL)
TDA9812 Multistandard VIF-PLL andFM-PLL/AM demodulator(多標(biāo)準(zhǔn)的VIF-PLL 和FM-PLL/AM解調(diào)器)
TDA9812T Multistandard VIF-PLL and FM-PLL/AM demodulator
TDA9813T VIF-PLL with QSS-IF and dual FM-PLL demodulator(帶QSS-IF和雙路FM-PLL解調(diào)器的VIF-PLL)
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
TDA9615H 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Audio processor for VHS hi-fi
TDA9725 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Y/C automatic adjustment processor VHS standard
TDA9800 制造商:NXP Semiconductors 功能描述:Video/TV Circuit, TV Video Receiver Circuit, 20 Pin, Plastic, DIP
TDA9800T 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:VIF-PLL demodulator and FM-PLL detector
TDA9801 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Single standard VIF-PLL demodulator and FM-PLL detector
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