7 Parameter Measurement Information

7.1 AC Measurement Configurations

The circuit configuration used for noise measurements is seen in Figure 7-1. The nominal IDS current is

configured in the schematic by calibrating V–. After IDS is fixed, the VDS voltage is set by calibrating V+. For

input-referred noise data, the gain of the circuit is calibrated from VIN to VOUT and used for the input-referred gain

calculation.

V+

JFE150

V

IN

R

D

RS

+

±

+

±

+

±

V±

3 mF

3 mF

10 k

10 k

10 k

10 k

+

±

+

±

+

±

F

F

100 k

100 k

10 k

10 k

OPA210

RG

V

OUT

Figure 7-1. AC Measurement Reference Schematic

JFE150

SLPS732B – JUNE 2021 – REVISED APRIL 2023

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8

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