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參數(shù)資料
| 型號： | μPC8126K |
| 廠商： | NEC Corp. |
| 英文描述： | 900 MHz Band Direct Quadrature Modulator IC(900 MHz 頻帶直接積分調(diào)節(jié)器芯片) |
| 中文描述： | 900兆赫頻帶的直接正交調(diào)制器集成電路（900兆赫的頻帶直接積分調(diào)節(jié)器芯片） |
| 文件頁數(shù)： | 11/20頁 |
| 文件大?。?/td> | 189K |
| 代理商： | ΜPC8126K |
Preliminary Data Sheet P13488EJ1V0DS00
11
μ
PC8126K
I
Ib
Qb
Q
÷
2F/F
from LOin
to MODout
×
2
RELATION BETWEEN I/Q PIN INPUT DC VOLTAGE AND AMPLITUDE
I/Q input signal (mV
P-P
)
Supply Voltage (V)
V
CC
I/Q DC Voltage (V)
V
CC
/2 = I = Ib = Q = Qb
Single ended input
I = Q
Differential input
I = Ib = Q = Qb
2.7 to 3.6
1.35 to 1.8
≤
500
≤
250
EXPLANATION OF INTERNAL FUNCTION
Block
Function/Operation
Block Diagram
90° PHASE
SHIFTER
Input signal from LO is send to digital circuit of
T-type flip-flop through frequency doubler.
Output signal from T-type F/F is changed to
same frequency as LO input and that have
quadrature phase shift, 0°, 90 °, 180°, 270°.
These circuits have function of self phase
correction to make correctly quadrature
signals.
BUFFER AMP.
Buffer amplifiers for each phase signals to
send to each mixers.
MIXER
Each signals from buffer amp. are quadrature
modulated with two double-balanced mixers.
High accurate phase and amplitude inputs are
realized to good performance for image
rejection.
ADDER
Output signals from each mixers are added
with adder and send to final amplifier.
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