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| 型號(hào)： | TZA1047HL/M1B |
| 廠商： | NXP SEMICONDUCTORS |
| 元件分類(lèi)： | 消費(fèi)家電 |
| 英文描述： | SPECIALTY CONSUMER CIRCUIT, PQFP64 |
| 封裝： | 10 X 10 MM, 1.4 MM HEIGHT, PLASTIC, MS-026, SOT314-2, LQFP-64 |
| 文件頁(yè)數(shù)： | 5/69頁(yè) |
| 文件大小： | 324K |
| 代理商： | TZA1047HL/M1B |
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9397 750 14664
Koninklijke Philips Electronics N.V. 2005. All rights reserved.
Product data sheet
Rev. 02 — 1 June 2005
13 of 69
Philips Semiconductors
TZA1047
Preprocessor IC for CD and DVD rewritable
7.5.3 FTC circuit signals
The signals to the FTC circuit comprise the following:
FA = VSA/RFTC to FH = VSH/RFTC
FAD=FA+FD
FBC=FB+FC
Where RFTC is the conversion resistance.
These signals are combined in the FTC block to provide various Fast Track Count
methods.
7.5.4 Signals L and R
The output currents L and R represent the signals from the left and right halves,
respectively, of the PDIC pupil. They are processed by the P-P Normalizer/Balancer to
obtain a P-P signal suitable for wobble detection. Signals L and R are dened by:
PA = VSA/RPP to PD = VSD/RPP
L = 2(PA + PD + IRLOFF) + IPPOFF for bit R/L = 0; L = 2(PA + PD) + IPPOFF for bit R/L = 1
R = 2(PB + PC + IPPOFF) for bit R/L = 0; R = 2(PB + PC + IRLOFF) for bit R/L = 1
Where RPP is the conversion resistance; IRLOFF is the offset current between signals
L and R.
The bandwidth of signals L and R is determined by low-pass lter LPF2 and can be
selected using the control bits BWPP1[2:0].
In order to set IRLOFF, the offset of signals L and R must be measured separately by
setting bit CALRL to logic 1. In this mode, R is sent to Q1 and L is sent to Q2 and are NOT
available to the push-pull circuit.
When the P-P Normalizer/Balancer circuit is not used (bit PPBAL = 0), the related circuit
in the Distributor is switched off to save power.
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