EL4585CS 查看數據表（PDF） - Elantec -> Intersil

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产品描述 (功能)

生产厂家

EL4585CS

Horizontal Genlock, 8 FSC

Elantec -> Intersil 

EL4585C

Horizontal Genlock 8 FSC

Typical Application

Horizontal genlock provides clock for an analog to digital converter digitizing analog video

Xtal VCO Component Values (Approximate)

Frequency

(MHz)

R1

(kX)

C1

(pF)

C2

(mF)

26 602

300

15

001

27 0

300

15

001

29 5

300

15

001

35 468

300

15

001

21 476

300

15

001

24 546

300

15

001

28 636

300

15

001

The above oscillators are arranged as Colpitts os-

cillators and the structure is redrawn here to em-

phasize the split capacitance used in a Colpitts

oscillator It should be noted that this oscillator

configuration is just one of literally hundreds

possible and the configuration shown here does

not necessarily represent the best solution for all

applications Crystal manufacturers are very in-

formative sources on the design and use of oscil-

lators in a wide variety of applications and the

reader is encouraged to become familiar with

them

4585 – 18

Colpitts Oscillator

4585 – 12

C1 is to adjust the center frequency C2 DC iso-

lates the control from the oscillator and V1 is the

primary control device C2 should be much larger

than CV so that V1 has maximum modulation

capability The frequency of oscillation is given

by

1

Fe

2q0LCT

CT

e

(C1C2)

a

C1C2CV

(C1CV) a

(C2CV)

9

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