參數(shù)資料
型號： 3239-00
廠商： Electronic Theatre Controls, Inc.
英文描述： 2.2 GHz Integer-N PLL for Low Phase Noise Applications
中文描述： 2.2 GHz的整數(shù)N的低相位噪聲鎖相環(huán)的應(yīng)用
文件頁數(shù)： 7/13頁
文件大?。?/td> 221K
代理商： 3239-00
PE3239
Product Specification
Functional Description
PEREGRINE SEMICONDUCTOR CORP.
|
http://www.peregrine-semi.com
Copyright
Peregrine Semiconductor Corp. 2001
Page 7 of 13
The PE3239 consists of a prescaler, counters, a
phase detector, charge pump and control logic. The
dual modulus prescaler divides the VCO frequency
by either 10 or 11, depending on the value of the
modulus select. Counters “R” and “M” divide the
reference and prescaler output, respectively, by
integer values stored in a 20-bit register. An
additional counter (“A”) is used in the modulus
select logic.
The phase-frequency detector generates up and
down frequency control signals which direct the
charge pump operation. The control logic includes a
selectable chip interface. Data is written into the
internal registers via the three wire serial bus.
There are also various operational and test modes
and a lock detect output.
Figure 5. Functional Block Diagram
Control
Logic
Modulus
Select
10/11
Prescaler
M Counter
(9-bit)
R Counter
(6-bit)
Phase
Detector
PD_U
PD_D
LD
Cext
R(5:0)
M(8:0)
A(3:0)
Sdata
Control
Pins
f
r
F
in
F
in
Charge
Pump
CP
f
c
f
p
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