18

• This catalog has only typical specifications because there is no space for detailed specifications. Therefore, please review our product specifications or consult the approval sheet for product specifications before ordering.

4

2. Application to Various Oscillation Circuits

Oscillation frequency fosc. in this circuit is expressed

approximately by the following equation.

Where,

This clearly shows that the oscillation frequency is

influenced by the loading capacitance. Further caution

should be paid in defining its value when a tight

tolerance of oscillation frequency is required.

Application to C-MOS Inverter

For the C-MOS inverting amplifier, the one-stage 4069

C-MOS group is best suited.

The C-MOS 4049 type is not used, because the three-

stage buffer type has excessive gain, which causes RC

oscillation and ringing.

Murata employs the TOSHIBA TC4069UBP as a

C-MOS standard circuit. This circuit is shown in

Fig. 4-2. The oscillation frequency of the standard

circuit in Fig. 4-2.

fosc.=Fr 1+

(4-1)

Fig. 4-2 C-MOS Standard Circuit

14

12

Rf

34

7

Rd

Output

IC:TC4069UBP(TOSHIBA)

Item

Part Number

Frequency Rage

Circuit Constant

CSTLS□G53

3.40—10.00MHz

+5V

(15pF)

(15pF)

Rf

1MΩ

Rd

0

P17E.pdf

2012.10.31