TDA1576T データシートの表示（PDF） - Philips Electronics

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TDA1576T

FM-IF amplifier/demodulator circuit

Philips Electronics 

Philips Semiconductors

FM/IF amplifier/demodulator circuit

Product specification

TDA1576T

2

handbook, halfpage

V3-7

V3-7 (max)

1

MEH148

∆V5

0

0

1

2 V5 (V) 3

Fig.9 Standby switch.

handbook, full pagewidth

33 pF

3

4

TDA1576T

560

pF

6

7

9

8

33 pF

(1)

39 pF

(1)

L1

1 kΩ

560

pF

L2

390 Ω

39 pF

MBK240

C8-9

VoAF

Adjustment of the demodulator circuit is obtained with an IF signal which is higher than the 3 dB limiting level; L2 should be short-circuited or detuned;

L1 should be adjusted to minimum d2 distortion, and then L2 to minimum d2 distortion.

(1) Coil data: L1 = L2 = 0.38 µH; Qo = 70; coil former KAN (C).

Fig.10 An example of the TDA1576T when using a demodulator with two tuned circuits.

1998 Nov 18

11

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