| 摘要 |
An automatic transistor threshold measuring circuit ( 100 ) can include a current source circuit ( 102 ) that can provide increasing amounts of current to a measured transistor (N 1 ) according to current setting values (I<SUB>CODE</SUB>). When a gate-to-source voltage of measured transistor (N 1 ) essentially equals a first reference voltage (Vref 1 ), the current setting values (I<SUB>CODE</SUB>) is stored. The process is repeated with a second reference voltage (Vref 1 ) to acquire a second current setting value (I<SUB>CODE</SUB>) A threshold voltage for the measured transistor (N 1 ) can be calculated according to the reference voltages (Vref 1 and Vref 2 ) and stored current setting values (I<SUB>CODE</SUB>).
|
