1999 Aug 26

18

Philips Semiconductors

Product specification

Single standard VIF-PLL demodulator

and FM-PLL detector

TDA9801

Fig.9 AM suppression (typical value) of the FM limiter amplifier as a function of the input voltage.

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−100

0

−80

−60

−40

−20

MHA885

1

Vi(SI) (mV)

10

αAM

(dB)

Fig.10 AF output signal and signal-to-noise ratio as a function of the input voltage.

(1) Signal-to-noise ratio (weighted).

(2) AF output signal (typical value).

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460

480

500

520

540

MHA886

110

50

60

40

30

20

Vi(SI) (mV)

S/NW

(dB)

(1)

(2)

Vo(AF)(rms)

(mV)