TDA5744TS datasheet(10/20 Pages) PHILIPS

부품명	TDA5744TS

상세설명	Low power mixers/oscillators for hyperband tuners

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제조업체	PHILIPS [NXP Semiconductors]

홈페이지	http://www.nxp.com

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10 / 20 page

1998 Mar 09

10

Philips Semiconductors

Preliminary speciﬁcation

Low power mixers/oscillators for

hyperband tuners

TDA5744; TDA5745

Fig.6 Cross modulation measurement in the VHF band.

(1) N1 is 2

× 5 turns.

(2) N2 is 2 turns.

Zi >> 50 Ω⇒ Vi =2 × Vmeas; V’meas =Vo − 16 dB (transformer ratio

and transformer loss).

Wanted input signal Vi =80dBµV at wanted fRF = 45.25 MHz (399.25 MHz).

Measured level of the unwanted output signal Vou causing 1% AM modulation in the wanted output signal;

unwanted fRF = 50.75 MHz (404.75 MHz); Vou =V’meas +16dB.

N1

N2

--------

5

=

handbook, full pagewidth

unwanted

signal

source

eu

ew

50

Ω

50

Ω

wanted

signal

source

50

Ω

MGL275

D.U.T.

18 dB

attenuator

50

Ω

o

V

FILTER

38.9 MHz

modulation

analyzer

HYBRID

AC

BD

V

RMS

voltmeter

Vi

AM = 30%

meas

V'

VHFIN

IFOUT1

IFOUT2

C

T

50

Ω

V

Vmeas

RMS

voltmeter

(1)

N1

(2)

N2

Fig.7 Cross modulation measurement in the UHF band.

handbook, full pagewidth

unwanted

signal

source

50

Ω

50

Ω

wanted

signal

source

50

Ω

50

Ω

MGL276

D.U.T.

18 dB

attenuator

50

Ω

o

V

FILTER

38.9 MHz

modulation

analyzer

HYBRID

AC

BD

HYBRID

AC

BD

V

RMS

voltmeter

Vi

AM = 30%

eu

ew

(1)

N1

(2)

N2

UHFIN1 IFOUT1

IFOUT2

UHFIN2

C

T

50

Ω

V

Vmeas

RMS

voltmeter

(1) N1 is 2

× 5 turns.

(2) N2 is 2 turns.

Vi =Vmeas; V’meas =Vo − 16 dB (transformer ratio

and transformer loss).

Wanted input signal Vi =70dBµV at fRF = 407.25 MHz (855.25 MHz).

Measured level of the unwanted output signal Vou causing 1% AM modulation in the wanted output signal;

unwanted fRF = 412.75 MHz (860.75 MHz); Vou =V’meas +16dB.

N1

N2

--------

5

=

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TDA5744TS 데이터시트(PDF) 10 Page - NXP Semiconductors

TDA5744TS 데이터시트(HTML) 10 Page - NXP Semiconductors

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