In gallium arsenide - technologie be led a semiconductor device

摘要

Circuitry and semiconductor devices which can be implemented in gallium arsenide technology for generating a substantially constant reference voltage and for generating a substantially constant reference current are described. JFET transistors 80, 88 are connected in series and connected to the gate of JFET 96 in series with JFET 100. A variable resistor 98 and JFET 106 are coupled to a load 108. Transistors 80, 88 generate a constant voltage at mode B. Variable resistor 98 is constructed using a network of resistors connected by laser programmable fuses, allowing a desired overall resistance to be chosen. IMAGE