JUNCTION FIELD-EFFECT TRANSISTOR CHARACTERISTICS RELEVANT TO ANALOG SWITCH CIRCUITS.
Abstract
The junction Field-Effect Transistor (FET) is evaluated for use in analog switch circuits. FET characteristics, such as channel resistance, drain cutoff current, pinch-off voltage and device capacitance, are analyzed for sensitivity to changes in temperature and voltage. Equivalent circuits are provided for an FET used as an analog switch. Separate equivalent circuits are used for transient analysis and steady-state analysis. A series analog switch is analyzed for turn-off transients that occur for various rise-time gate control signals. An effective voltage Ve is introduced to facilitate a two-part transient analysis for an initial and final turn-off transient. Turn-on transients are analyzed qualitatively. A steady-state analysis shows the effect of temperature on the error voltage at the analog switch output. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Apr 01, 1967
- Accession Number
- AD0656889
Entities
People
- Edgar H. Fischer
Organizations
- Johns Hopkins University Applied Physics Laboratory