EL4089 查看數據表（PDF） - Elantec -> Intersil

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生产厂家

EL4089

DC Restored Video Amplifier

Elantec -> Intersil 

EL4089C

DC Restored Video Amplifier

Table of Charge Storage Capacitor vs Droop Charging Rates

Cap Value

nF

Droop in 60 ms

mV

Charge in 1 2 ms

mV

10

6

36

33

18

11

100

06

36

Basic formulae are

V (droop) e Iba (Line time b Sample time) Capacitor

and V (charge) e IOUT Sample time Capacitor

Charge in 4 ms

mV

120

36

12

For best results the source impedance should be

kept low using a buffer for example

Because the S H effectively shorts the input sig-

nal during Sample the input should not be sam-

pled during active video Typically the sample is

made during the back porch period of horizontal

blanking For this reason color composite signals

which have color burst on the back porch can

not be passed See EL2090 or EL4093 for this ap-

plication

General Disclaimer

Specifications contained in this data sheet are in effect as of the publication date shown Elantec Inc reserves the right to make changes

in the circuitry or specifications contained herein at any time without notice Elantec Inc assumes no responsibility for the use of any

circuits described herein and makes no representations that they are free from patent infringement

Elantec Inc

1996 Tarob Court

Milpitas CA 95035

Telephone (408) 945-1323

(800) 333-6314

Fax (408) 945-9305

European Office 44-71-482-4596

WARNING Life Support Policy

Elantec Inc products are not authorized for and should not be

used within Life Support Systems without the specific written

consent of Elantec Inc Life Support systems are equipment in-

tended to support or sustain life and whose failure to perform

when properly used in accordance with instructions provided can

be reasonably expected to result in significant personal injury or

death Users contemplating application of Elantec Inc products

in Life Support Systems are requested to contact Elantec Inc

factory headquarters to establish suitable terms conditions for

these applications Elantec Inc ’s warranty is limited to replace-

ment of defective components and does not cover injury to per-

sons or property or other consequential damages

8

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