AN5290 データシートの表示（PDF） - Panasonic Corporation

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AN5290

Antenna diversity IC for on-vehicle TV

Panasonic Corporation 

AN5290S

ICs for TV

s Technical Information

Note) The following characteristics are the reference value for design and not guaranteed value. The timing chart is for explaining

the IC operation plainly. Those vary depending on input condition.

1. Timing chart 1

• When NTSC reception (in horizontal and vertical synchronization) antenna is selected.

Electric field judgment and antenna selection timing when the change over from ANT-1 to ANT-3 by the

antenna selection is done.

5H

6H

7H

8H

9H

1st field video signal

Horizontal sync. signal

(pin 5)

VCO signal

(internal clock of IC)

Electric field judgment timing

(internal clock of IC)

Noise detection output

signal (pin 20)

Noise detection hold

(pin 19)

ANT-1 output

(pin 16)

10.593 µs

(Electric field judgment level)

ANT-2 output

(pin 15)

ANT-3 output

(pin 14)

ANT-4 output

(pin 13)

Selected antenna

Output for N.C.

(pin 6)

5.296 µs

ANT- 1 2 3 4 3 21.186 µs

(In the above timing chart, the 1st field video signal is not an internal signal but an

input signal, and some signals which do not outputted to pins, as VCO signal, are

included.)

4

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