Analog Electronics with LabVIEW®

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7.3. Body Effect and Source-Follower Voltage Transfer Relation

Suppose now, as in Fig. 7.3, that the body terminal is connected to V_SS, which is signal ground. Following the definition of the body-effect transconductance, g_mb, the component of I_d due to source-body voltage V_sb is [from (4.1)]

Equation 7.9

Since the body is at zero potential (signal), this is

Equation 7.10

This component of current can be included in the circuit, as shown in Fig. 7.3, with an additional resistance in parallel with R_S of value 1/g_mb. That is, the body-effect ...

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