LA76818 데이터 시트보기 (PDF) - Unspecified

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LA76818

The BUS Control Functions of LA76818 (Tentative)

Unspecified 

Technical Note of LA76818

2002/01/23

［The example application circuit］

VB

４

Io

R1

Vout

＋

R2

Vout

R2

R1+R2

(Vb-Io ･ R1)

The BUS statue is ‘1’ if Vb, R1, R2 is set as below and the Vout is 6V:

Vb = 9V, R1 = 30KΩ, R2 = 120KΩ

PIN 5,6 (PIF AMP INPUT)

This is a PIF input pin. The input impedance Ri is about 1.5kΩ and the input

capacity is about 5pF.

This is a balanced input and it needs a 0.01uF capacitor for coupling. The balanced error

generated in the SAW filter and the printed plate can be canceled and the weak field

characteristic may be improved by using C1 to cross the IC input pin layout on the

printed plate.

From

tuner

SAW

5

3.6V

C1

6

1K 1K

５

From

tuner

SAW

６

5

15K

C1

6

The circumference circuit of pin 5 & 6

19/ 46

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