參數(shù)資料
型號(hào): SA2400ABE
廠商: NXP SEMICONDUCTORS
元件分類: 無(wú)繩電話/電話
英文描述: Single chip transceiver for 2.45 GHz ISM band
中文描述: TELECOM, CELLULAR, RF AND BASEBAND CIRCUIT, PQFP48
封裝: 7 X 7 MM, 1.40 MM HEIGHT, PLASTIC, SOT-313-2, LQFP-48
文件頁(yè)數(shù): 16/34頁(yè)
文件大?。?/td> 325K
代理商: SA2400ABE
Philips Semiconductors
Product data
SA2400A
Single chip transceiver for 2.45 GHz ISM band
2002 Nov 04
16
12.3 Phase detector (see Figure 6)
The reference and main divider outputs are connected to a
phase/frequency detector that controls the charge pump. The pump
current is set by the control bit CP (Synthesizer Register C). The
dead zone (caused by finite time taken to switch the current sources
on or off) is cancelled by forcing the pumps ON for a minimum time
(
τ
) at every cycle (backlash time) providing improved linearity.
SR02355
R
M
P
N
REF DIVIDER
MAIN
DIVIDER
D
Q
CLK
1
R
D
R
CLK
1
M
Q
N
P
τ
V
CC
I
PH
GND
P–TYPE
CHARGE PUMP
N–TYPE
CHARGE PUMP
R
f
REF
f
REF
I
PH
τ
τ
f
RF
Figure 6.
Phase Detector Structure with Timing
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