10

• 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.

It is common and simple to utilize an inverter for the

Fig. 2-8 shows the basic oscillation circuit with inverter.

In an open loop circuit by cutting at point Ⓐ , it is

Fig. 2-9 shows the actual measuring circuit, and an

example of the measuring result is shown in Fig. 2-10.

2

A

Rf

Fig. 2-8 Basic Oscillation Circuit with Inverters

IC

Rf

Vin

S.S.G

Vector

Volt

Meter

Fig. 2-9 Measuring Circuit Network of Loop Gain and Phase Shift

Frequency (MHz)

Frequency (MHz)

Phase

(Oscillation)

Gain

-40

-30

-20

-10

0

10

20

30

40

3.80

-90

-180

0

90

180

Phase

(No Oscillation)

Gain

-40

0

40

3.80

4.00

3.90

4.10

4.00

4.20

4.20

3.90

4.10

-90

-180

0

90

180

Fig. 2-10 Measured Results of Loop Gain and Phase Shift

Loop Gain : G= α · β

CSTLS4M00G53–B0

IC : TC4069UBP  

  (TOSHIBA)

CSTLS4M00G53–B0

IC : TC4069UBP  

  (TOSHIBA)

P17E.pdf

2012.10.31