TK10931VTL 데이터 시트보기 (PDF) - Toko America Inc

부품명

상세내역

제조사

TK10931VTL

NARROW BAND FM/AM IF SYSTEM

Toko America Inc  

TK10931V

CIRCUIT DESCRIPTION (CONT.)

VCC

VCC

VCC

Crystal Resonator

LC Resonator

SAW Resonator

FIGURE 2: EXAMPLES FOR COLPITTS TYPE OSCILLATOR

External Injection

If an external oscillator is used instead of the internal oscillator, inject the oscillating signal into Pin 1 by a capacitor

connection. Pin 2 must be opened, as shown in Figure 3.

In this case, the multiplier sees the oscillator being operated as an emitter follower.

VCC

Pin 2 must be open

FIGURE 3: EXAMPLE FOR EXTERNAL OSCILLATOR

Overtone Oscillation

When operating an overtone oscillation above 30 MHz using a crystal resonator, design using the circuit shown in Figure

5 to reduce the fundamental mode.

When the operation frequency is higher, it is possible that the Gm of the oscillator may be insufficient and the oscillating

amplitude will be down. This can be improved by connecting an external resistor between Pin 2 and GND to increase the

operating current.

Page 18

January 2001 TOKO, Inc.

Share Link: