NE5230 데이터 시트보기 (PDF) - ON Semiconductor

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NE5230

Low voltage operational amplifier

ON Semiconductor 

NE5230, SA5230, SE5230

By adding another NE5230 in an inverting summer

configuration at the output of the half−wave rectifier, a

full−wave can be realized. The values for the input and

feedback resistors must be chosen so that each peak will

have equal amplitudes. A table for calculating values is

included in Figure 12. The summing network combines the

input signal at the half−wave and adds it to double the

half−wave’s output, resulting in the full−wave. The output

waveform can be referenced to the supply or ground,

depending on the half−wave configuration. Again, no

diodes are needed to achieve the rectification.

This circuit could be used in conjunction with the remote

transducer to convert a received AC output signal into a DC

level at the full−wave output for meters or chart recorders

that need DC levels.

INPUT

500mV

500mV

520ms

HALF-WAVE

OUTPUT

+VIN

a

b

−VIN

FULL-WAVE

OUTPUT

R3

500mV

R5

+VIN

a

b

−VIN

3

+

7

A1

6

R1

5

2− 4

R2 VEE

VCC

R4 2

−7

A2

6

3

5

+4

+VIN

+VB

a

b

FULL-WAVE

NOTES:

R2 = 2 R1

R4 = R5 = R3

+VB will vary output reference.

For single supply operation VEE

can be grounded on A2.

0

−2VIN

2a

HALF-WAVE

+VB

VEE

Figure 12. Adding an Inverting Summer to the Input and Output of the Half−Wave will Result in Full−Wave

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