A nonvolatile analog programmable voltage source using the VIPMOS EEPROM structure

A programmable voltage source using the vertical injection punchthrough based MOS (VIPMOS) EEPROM structure is presented. The circuit operates at a single 5-V supply and the output voltage is continuously available even during programming. The effect of programming is linearly dependent on the programming time. During programming no crosstalk from the enable pulses and only a little crosstalk from the program current are observed. If a decreasing program current is used, the output of the circuit can be set to its desired value without the need of an iterative program process.<
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