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APPLICATION INFORMATION

TEST CIRCUITS

1

2

3

4

8

7

6

5

GND1

OUT1

OUT2

GND2

VCC

IN1

IN2

AGC

S0120-01

SG (50

Ω)

0.1

µF

200

Ω

Spectrum Analyzer

(50

Ω)

0.1

µF

200

Ω

VCC

47

µF

0.1

µF

0.1

µF

0.1

µF

51

Ω

0.1

µF

51

Ω

1

2

3

4

8

7

6

5

GND1

OUT1

OUT2

GND2

VCC

IN1

IN2

AGC

S0121-01

0.1

µF

200

Ω

Spectrum Analyzer

(50

Ω)

0.1

µF

200

Ω

VCC

47

µF

0.1

µF

0.1

µF

0.1

µF

51

Ω

0.1

µF

SG1 (50

Ω)

SG2 (50

Ω)

51

Ω

+

SN761663

SLES151 – OCTOBER 2005

Figure 9 and Figure 10 are test circuits for the SN761663. Figure 9 is the circuit for measurement of gain and

output voltage. Figure 10 is the circuit for measurement of intermodulation distortion and input intercept point.

This application information is advisory, and a performance check is required for actual application circuits.

Figure 9. Measurement Circuit for Gain and Output Voltage

Figure 10. Measurement Circuit for IM3 and IIP3

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