MC3358DR2 查看數據表（PDF） - ON Semiconductor

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MC3358DR2

Dual, Low Power Operational Amplifiers

ON Semiconductor 

Vref =

1

2

VCC

Vref

MC3458, MC3358

Triangle Wave

Output

+

1/2

MC3458

-

C

R3

75 k

R1

100 k

Vref

Rf

R2

300 k

+

1/2

MC3458

-

f = R1 +RC

4 CRf R1

if,

R3 =

R2 R1

R2 +R1

Figure 14. Function Generator

Square Wave

Output

VCC

C

R3

R1

C

Vin

-

1/2

MC3458

R2

+

VO

CO

CO = 10 C

Vref

Vref =

1

2

VCC

Given: fo = center frequency

A(fo) = gain at center frequency

Choose value fo, C.

Then:

R3 =

Q

π fo C

R1 =

R3

2 A(fo)

R2 =

R1 R5

4Q2 R1 - R3

For less than 10% error from operational amplifier

where, fo and BW are expressed in Hz.

Qo fo < 0.1

BW

If source impedance varies, filter may be preceded with

voltage follower buffer to stabilize filter parameters.

Figure 15. Multiple Feedback Bandpass Filter

http://onsemi.com

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