UPC8110GR Просмотр технического описания (PDF) - NEC => Renesas Technology

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UPC8110GR

1 GHz DIRECT QUADRATURE MODULATOR FOR DIGITAL MOBILE COMMUNICATION

NEC => Renesas Technology 

EXPLANATION OF INTERNAL FUNCTION

BLOCK

FUNCTION/OPERATION

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.

µPC8110GR

BLOCK DIAGRAM

from LOin

×2

÷ 2 F/F

MIXER

Each signals from buffer amp. are quadrature

I

modulated with two double-balanced mixers.

I

High accurate phase and amplitude inputs are

realized to good performance for image

Q

rejection.

Q

ADDER

Output signals from each mixers are added with

adder and send to final amplifier.

to MODout

Data Sheet P11074EJ3V0DS00

7

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