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Application of the Equivalent Circuit in Measuring gm

Author: E.E. Kimberly

Fig. 27-16. Circuit for Measuring gm

The grid-plate transconductance gm may be measured by means of the circuit shown in Fig. 27-16. The circuit is balanced by varying R until Ip = 0. For this circuit,

ee_101-436.png

From Equations (27-19) and (27-20),

ee_101-437.png

When

ee_101-438.png

Therefore,

ee_101-439.png
Home Electronic Devices Application of the Equivalent Circuit in Measuring gm

Last Update: 2010-10-06