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Fabricante

CXA3025N

All Band TV Tuner IC (VHF-CATV-UHF)

Sony Semiconductor 

CXA3025N

Application Circuit

IF OUT

+9V PLL OUT

VC

15µ

100

1n

1n

+9V

BAND SW

ON: UHF

OFF: VHF

10k

1n

1T363

47k

0.5φ 3.8φ 1.5t

0.5p (UK) 0.5p (UK)

47k

7p

1n 15p

3.3k

4p

2p

47k

1T363

47k

0.5φ

3.2φ

2.5t

0.5φ

3.2φ

3.3k VL

5.5t

51

51 VH

1n

1n

47k

0.5p (UK) 47k

15p

1T363 68p (RH)

4p

1T362 16p

47k

1n

1p (UK)

22

24 23 22 21 20 19 18 17 16 15 14 13

CXA3025N

1

2

3

4

5

6

7

8

9

10 11 12

4.7k

27P

150P

1n 1n

1n 1n

12.5t 3.5t

4φ 4φ

VHF IN

UHF IN

Inductance constant

4.7µ

1n

L without indication is an air-core coil of 0.5mm diameter.

+9V

Circuit when using two varicap diodes for the UHF oscillator,

improving the oscillator stability and frequency variable range,

and using a double tune circuit for the IF tune circuit.

Application circuits shown are typical examples illustrating the operation of the devices. Sony cannot assume responsibility for

any problems arising out of the use of these circuits or for any infringement of third party patent and other right due to same.

–6–

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