UPC8126K-E1 데이터 시트보기 (PDF) - NEC => Renesas Technology

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UPC8126K-E1

900 MHz BAND DIRECT QUADRATURE MODULATOR IC FOR DIGITAL MOBILE COMMUNICATION SYSTEMS

NEC => Renesas Technology 

µPC8126K

RELATION BETWEEN I/Q PIN INPUT DC VOLTAGE AND AMPLITUDE

Supply Voltage (V)

VCC

2.7 to 3.6

I/Q DC Voltage (V)

VCC/2 = I = Ib = Q = Qb

1.35 to 1.8

I/Q input signal (mVP-P)

Single ended input

I=Q

Differential input

I = Ib = Q = Qb

≤ 500

≤ 250

EXPLANATION OF INTERNAL FUNCTION

Block

90° PHASE

SHIFTER

Function/Operation

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.

Block Diagram

from LOin

×2

÷2F/F

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.

I

High accurate phase and amplitude inputs are Ib

realized to good performance for image

rejection.

Qb

Q

ADDER

Output signals from each mixers are added

with adder and send to final amplifier.

to MODout

Preliminary Data Sheet P13488EJ1V0DS00

11

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