| 摘要 |
A method of shifting the effective thresholds of a UV-activated floating gate P-MOS transistor and a UV-activated floating gate N-MOS transistor connected in series between the power supply rails of a circuit, the method comprising the steps of: applying a voltage equal to half the sum of the desired negative and positive power supply voltages to all inputs of the transistor arrangement; applying a negative offset voltage to the positive power supply rail and a positive voltage to the negative power supply rail; applying UV light to the transistors until the floating gate voltages of each transistor reach the respective applied offset voltages; and applying the desired power supply voltages to the appropriate power supply rails. |
