UPC8101GR datasheet(7/28 Pages) NEC

Part #	UPC8101GR

Description	1 GHz DIRECT QUADRATURE MODULATOR FOR DIGITAL MOBILE COMMUNICATION

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Manufacturer	NEC [NEC]

Direct Link	http://www.nec.com/

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Data Sheet P11074EJ3V0DS00

7

µµµµPC8110GR

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.

I

from LOin

× 2

÷ 2 F/F

I

Q

to MODout

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