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to PLL

synthesizer IC

Vtune

from PLL synthesizer IC

100 nF

FCE415

ASYM

100 nF

1 pF

100 nF

AMP

AMP

SYM

1 pF

LNA

BASEBAND

STAGE

I CONVERTER

×

100 MHz

ASYM

SYM

Q CONVERTER

×

100 MHz

CONVERSION STAGE

RFA

6

IBBOUT

13

QBBOUT

to

I channel

ADC

to

Q channel

ADC

12

VCC(BB)

9

BBGND

16

RFB

RF

(2)

RF

5

AGC

1

PEN

0 to 5 V

3

QUADRATURE

GENERATOR

STABILIZED LO

PLL AND

AMPLIFIER

OSCILLATOR

DIVIDE-BY-2

TDA8060ATS

10

QOUT

24

LOOUT

23

LOOUTC

19

TKA

20

TKB

VCC(RF)

8

RFGND

7

VCC(MIX)

2

MIXGND

4

VCC(LO)

17

LOGND

18

VCC(DIV)

22

DIVGND

21

11

QBBIN

IOUT

15

IBBIN

14

6

Ω

6

Ω

20

k

Ω

20

k

Ω

1 pF

BB835

(2

×)

LOW-PASS

LOW-PASS

LOW-PASS

LOW-PASS

Fig.6 Application diagram.

(2) Differential RF input 950 to 2200 MHz; level =

−22 to −52 dBm per channel.

(3) The filter input impedance is 400

Ω minimum.