LA1805 データシートの表示（PDF） - SANYO -> Panasonic

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LA1805

AM/FM-IF/MPX Tuner System for Radio-Casette Recorders, Music Centers

SANYO -> Panasonic 

Test Circuit

LA1805

Polystyrene film capacitor

Differs from the application circuit

where a front end is used.

(See Sample Application Circuit

on page 10.)

How to use the LA1805

Unit (resistance : Ω, capacitance : F)

1. Forced monaural mode.

Figures 1 and 2 show how to cause the forced monaural mode to be entered.

(1) Connect pin 14 to VCC through a resistor of 100kΩ. (Turn ON the SW1 in Figure 1.)

(2) Connect pin 15 to GND through a resistor of 47kΩ. (Turn ON the SW2 in Figure 2.)

Figure 1 Forced Monaural Mode Setting Method Figure 2 Forced Monaural Mode Setting Method

Either above-mentioned (1) or (2) causes the forced

monaural mode to be entered. In this case, the VCO

does not stop operating. If the resistance of R1 and

R2 are decreased, internal bias will vary when the S1

or S2 is turned ON. This data is shown in Figure 3.

Forced Monaural Mode Setting Resistance Free-

Running Frequency

Figure 3

No.2887-3/13

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