HD155111F Datasheet, PDF (38/44 Pages) Hitachi Semiconductor – RF Single-chip Linear IC for PCN Cellular Systems

HD155111F
Transmitter Measurement Results
3.0 V
1000 p
1 2 4 8 20 31 34 41 45
Input(LO),−10dBm ^{50 Ω} 4 p 1000 p
1st. local signal
1575 to 1650MHz
14
RFLOIN
1575 to 1650 MHz
Spectrum
analyzer
50 Ω
1000p
GMSK RF
TX. signal
1710 to 1785MHz
18
VCO
5.0V
1.5n
VCOIN
10
0.75 p
VCCCOMP
11
1000p
LO buffer
VCO buffer
I3 I1
Down-converter
I&Q modulator block
(offset mixer)
Low pass
÷2
(90° phase shifter)
filter
135 MHz
GMSK modulated IF
135 MHz
Q baseband signal
100 kHz
MURATA MQE520-1747 _R3
Kv=30MHz/V
220 R2
C3=100pF
loop band width=1.5MHz
C2 ¹³⁰
3300p
RICURAD
22k
PLLOUT ₁₂
C1
on
220p
13
ICURAD
I2
off
SW1
Phase detector
Low
Charge Pump _pass
(Current mode driver) _filter
Power save control
POONTX=H, SW1=Off
I baseband signal
100 kHz
Conditions:
Vcc = 3.0 V
POONRX1 (pin 1) = 0 V
POONRX2 (pin 2) = 0 V
POONTX (pin 7) = 3.0 V
5 7 9 22 30 35 40 46 18 19 14 15 16 17
21
13p
39n
39n
Vcc
fo=135MHz
I&Q baseband
signal generator
0.01µ
Input(IFLO)
50Ω _540MHz,
−10dBm
Figure 37 Evaluation Circuit for the Upconverter (I&Q Modulator and Offset PLL Block)
5
I1 peak
I2 peak
I3
4
3
2
1
0
2
4
6
8 10
20
30
R
[kΩ]