参数资料
型号: M64886FP
厂商: Renesas Technology Corp.
英文描述: RF Transceiver for Short-range Wireless
中文描述: 射频收发器的短距离无线
文件页数: 4/28页
文件大小: 445K
代理商: M64886FP
M64886FP
Rev.1.0, Sep.22.2003, page 12 of 27
4. X’tal Oscillation Circuit
4. 1 Connection of reference oscillation block
Built-in buffer transistor for oscillation enables direct oscillation at X’tal.
Connections of X’tal and TCXO are shown below . (recommended circuit)
When X’ tal is in use
When TCXO is in use
TCXO
VCC or OPEN
1000pF
XIN
XOUT
X’ tal
XIN
XOUT
4. 2 Negative Resistor Evaluation Circuit
Negative resistor in the oscillation circuit are measured on the conditions with coefficients shown in drawing below.
X’ tal : 16.2MHz/CL=12pF
C1
: 68pF
C2
: 36p
C3
: 68p
C4
: 18pF
CV
: ~20pF
VCC : 3V
Ta
: 25 C
Cv
C4
C3
C1
C2
R
C : CH t ype
XIN
XOUT
X’ tal
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