January 1980

13

Philips Semiconductors

Product specification

Signal-sources switch

TDA1029

Switch control

function

linear

H

H

H

subsonic filter ‘on’

H

H

L

rumble filter ‘on’

H

L

X

mute ‘on’

L

X

X

Fig.10 TDA1029 connected as a third-order active high-pass filter with Butterworth response and component

values chosen according to the method proposed by Fjällbrant. It is a four-function circuit which can select

mute, rumble filter, subsonic filter and linear response.