Electronic Components Datasheet Search
  English  ▼
ALLDATASHEET.COM

X  

TDA9881 Datasheet(PDF) 10 Page - NXP Semiconductors

Part # TDA9881
Description  Alignment-free vision and FM sound IF PLL demodulator for negative modulated TV standards
Download  42 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
Manufacturer  NXP [NXP Semiconductors]
Direct Link  http://www.nxp.com
Logo NXP - NXP Semiconductors

TDA9881 Datasheet(HTML) 10 Page - NXP Semiconductors

Back Button TDA9881 Datasheet HTML 6Page - NXP Semiconductors TDA9881 Datasheet HTML 7Page - NXP Semiconductors TDA9881 Datasheet HTML 8Page - NXP Semiconductors TDA9881 Datasheet HTML 9Page - NXP Semiconductors TDA9881 Datasheet HTML 10Page - NXP Semiconductors TDA9881 Datasheet HTML 11Page - NXP Semiconductors TDA9881 Datasheet HTML 12Page - NXP Semiconductors TDA9881 Datasheet HTML 13Page - NXP Semiconductors TDA9881 Datasheet HTML 14Page - NXP Semiconductors Next Button
Zoom Inzoom in Zoom Outzoom out
 10 / 42 page
background image
9397 750 13417
© Koninklijke Philips Electronics N.V. 2004. All rights reserved.
Product data sheet
Rev. 01 — 16 November 2004
10 of 42
Philips Semiconductors
TDA9881
Alignment-free vision and FM sound IF PLL demodulator
8.11 Single reference QSS mixer
With the present system high performance Hi-Fi stereo sound processing can be
achieved. For a simplified application without an SIF SAW filter, the single reference QSS
mixer can be switched to the intercarrier mode via pins SIF1 and SIF2; see Table 7.
The single reference QSS mixer generates the 2nd FM TV sound intercarrier signal. It is
realized by a linear multiplier which multiplies the SIF amplifier output signal and the
VIF PLL VCO signal which is locked to the picture carrier. In this way the QSS mixer
operates as a quadrature mixer in the intercarrier mode and provides suppression of the
low frequency video signals.
The QSS mixer output signal is fed internally via a high-pass and low-pass combination to
the FM demodulator as well as via an operational amplifier to the QSS output pin QSSO.
8.12 FM demodulator and acquisition help circuit
The narrow-band FM PLL detector consists of:
Gain controlled FM amplifier and AGC detector
Narrow-band PLL.
The intercarrier signal from the single reference QSS mixer is fed to the input of an
AC-coupled gain controlled amplifier with two stages. The gain controlled output signal is
fed to the phase detector of the narrow-band FM PLL (FM demodulator). For good
selectivity and robustness against disturbance caused by the video signal, a high linearity
of the gain controlled FM amplifier and of the phase detector as well as a constant signal
level are required. The gain control is done by means of an ‘in phase’ demodulator for the
FM carrier (from the output of the FM amplifier). The demodulation output is fed into a
comparator for charging or discharging the integrated AGC capacitor. This leads to a
mean value AGC loop to control the gain of the FM amplifier.
The FM demodulator is realized as a narrow-band PLL with an external loop filter, which
provides the necessary selectivity (bandwidth approximately 100 kHz). To achieve good
selectivity, a linear phase detector and a constant input level are required. The gain
controlled intercarrier signal from the FM amplifier is fed to the phase detector. The phase
detector controls, via the loop filter, the integrated low radiation relaxation oscillator. The
designed frequency range is from 4 MHz to 7 MHz.
The VCO within the FM PLL is phase-locked to the incoming 2nd SIF signal which is
frequency modulated. The VCO control voltage is superimposed by the AF voltage.
Therefore, the VCO tracks with the FM of the 2nd SIF signal. Thus, the AF voltage is
present at the loop filter and is typically 5 mV (RMS) for 27 kHz FM deviation. This
AF signal is fed via a buffer to the audio amplifier.
The correct locking of the PLL is supported by the digital acquisition help circuit; see
Section 8.6.


Similar Part No. - TDA9881

ManufacturerPart #DatasheetDescription
logo
NXP Semiconductors
TDA9880 PHILIPS-TDA9880 Datasheet
195Kb / 40P
   Alignment-free multistandard vision and FM sound IF-PLL demodulator
1999 Jul 21
TDA9880T PHILIPS-TDA9880T Datasheet
195Kb / 40P
   Alignment-free multistandard vision and FM sound IF-PLL demodulator
1999 Jul 21
TDA9882 NXP-TDA9882 Datasheet
236Kb / 45P
   Alignment-free multistandard vision and QSS FM sound IF PLL demodulator
Rev. 01-16 November 2004
TDA9882HN NXP-TDA9882HN Datasheet
236Kb / 45P
   Alignment-free multistandard vision and QSS FM sound IF PLL demodulator
Rev. 01-16 November 2004
TDA9882TS NXP-TDA9882TS Datasheet
236Kb / 45P
   Alignment-free multistandard vision and QSS FM sound IF PLL demodulator
Rev. 01-16 November 2004
More results

Similar Description - TDA9881

ManufacturerPart #DatasheetDescription
logo
NXP Semiconductors
TDA9880 PHILIPS-TDA9880 Datasheet
195Kb / 40P
   Alignment-free multistandard vision and FM sound IF-PLL demodulator
1999 Jul 21
TDA9882 NXP-TDA9882 Datasheet
236Kb / 45P
   Alignment-free multistandard vision and QSS FM sound IF PLL demodulator
Rev. 01-16 November 2004
logo
TEMIC Semiconductors
U828B TEMIC-U828B Datasheet
84Kb / 5P
   FM IF AMPLIFIER AND DEMODULATOR FOR TV SOUND APPLICATION
logo
NXP Semiconductors
TDA9887 PHILIPS-TDA9887 Datasheet
308Kb / 58P
   I2C-bus controlled multistandard alignment-free IF-PLL demodulator with FM radio
2004 Aug 25
TDA9887TS NXP-TDA9887TS Datasheet
232Kb / 58P
   I2C-bus controlled multistandard alignment-free IF-PLL demodulator with FM radio
2004 Aug 25
logo
TEMIC Semiconductors
U2861B TEMIC-U2861B Datasheet
263Kb / 11P
   Mono FM Sound Demodulator for TV Systems
logo
Siemens Semiconductor G...
TDA5950X SIEMENS-TDA5950X Datasheet
450Kb / 11P
   Video and Sound IF with FM-PLL Demodulator, AFC and V & S SCART
logo
TEMIC Semiconductors
U2860BB TEMIC-U2860BB Datasheet
417Kb / 11P
   Dual-Channel FM Sound Demodulator for TV Systems
logo
ATMEL Corporation
U2860B-M ATMEL-U2860B-M Datasheet
336Kb / 14P
   Dual-Channel FM Sound Demodulator for TV Systems
logo
STMicroelectronics
TDA8192 STMICROELECTRONICS-TDA8192 Datasheet
44Kb / 5P
   MULTISTANDARD AM AND FM SOUND IF CIRCUIT FOR TV
More results


Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42


Datasheet Download

Go To PDF Page


Link URL




Privacy Policy
ALLDATASHEET.COM
Does ALLDATASHEET help your business so far?  [ DONATE ] 

About Alldatasheet   |   Advertisement   |   Datasheet Upload   |   Contact us   |   Privacy Policy   |   Link Exchange   |   Manufacturer List
All Rights Reserved©Alldatasheet.com


Mirror Sites
English : Alldatasheet.com  |   English : Alldatasheet.net  |   Chinese : Alldatasheetcn.com  |   German : Alldatasheetde.com  |   Japanese : Alldatasheet.jp
Russian : Alldatasheetru.com  |   Korean : Alldatasheet.co.kr  |   Spanish : Alldatasheet.es  |   French : Alldatasheet.fr  |   Italian : Alldatasheetit.com
Portuguese : Alldatasheetpt.com  |   Polish : Alldatasheet.pl  |   Vietnamese : Alldatasheet.vn
Indian : Alldatasheet.in  |   Mexican : Alldatasheet.com.mx  |   British : Alldatasheet.co.uk  |   New Zealand : Alldatasheet.co.nz
Family Site : ic2ic.com  |   icmetro.com