データシートサーチシステム |
|
LM1291 データシート(PDF) 1 Page - National Semiconductor (TI) |
|
|
LM1291 データシート(HTML) 1 Page - National Semiconductor (TI) |
1 / 12 page TLH12323 June 1995 LM1291 Video PLL System for Continuous-Sync Monitors General Description The LM1291 is an integrated horizontal time base solution specifically designed to operate in continuous-sync video monitors It automatically synchronizes to any H frequency from 22 kHz to 125 kHz and provides the drive pulse to the high power deflection circuit Available sync processing includes a vertical sync separator and a composite video sync stripper An internal sync selec- tion scheme gives highest priority to separate H and V sync then composite sync and finally sync on video no external switching between sync sources is necessary The LM1291 provides polarity-normalized HHV and V sync outputs along with logic flags which show the respective input polar- ities The design uses an on-chip FVC (Frequency-to-Voltage Converter) to set the center frequency of the VCO (Voltage- Controlled Oscillator) This technique allows autosync oper- ation over the entire frequency range using just one opti- mized set of external components The system includes a second phase detector which com- pensates for storage time variation in the horizontal output transistor the picture’s horizontal position is thus indepen- dent of temperature and component variance The LM1291 provides DC control pins for H Drive duty cycle and flyback phase Features Y Wide continuous autosync range22 kHz to 125 kHz (1 57) with no component switching or external adjust- ments Y No manufacturing trims requiredinternal VCO capaci- tor trimmed on chip Y No costly high-precision components needed Y Low phase jitter (13 ns at 100 kHz) Y DC controlled H phase and duty cycle Y Video mute pulse for blanking during H frequency transitions Y Input sync prioritization Y Clamp pulse position and width control Y Continuous clamp pulse output even with no sync input Y Resistor-programmable minimum and maximum VCO frequency Y X-ray input disables H drive and mutes video until VCC powered down Y H drive disabled for VCC k 95V Y Horizontal output transistor protected against accidental turn-on during flyback Y Capacitor-programmable frequency ramping dfVCO dt protects H output transistor during scanning mode changes Connection Diagram TLH12323 – 1 FIGURE 1 Order Number LM1291N See NS Package Number N28B C1995 National Semiconductor Corporation RRD-B30M115Printed in U S A |
同様の部品番号 - LM1291 |
|
同様の説明 - LM1291 |
|
|
リンク URL |
プライバシーポリシー |
ALLDATASHEET.JP |
ALLDATASHEETはお客様のビジネスに役立ちますか? [ DONATE ] |
Alldatasheetは | 広告 | お問い合わせ | プライバシーポリシー | リンク交換 | メーカーリスト All Rights Reserved©Alldatasheet.com |
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 |