The first resistor couples between the emitter and the base of the transistor, and the second resistor couples to the base of the transistor. ![]() The bandgap reference circuit also includes two resistors. The base of the transistor couples to the IPTAT current source and the emitter of the transistor couples to the bias current source. The bandgap reference circuit includes a proportional to absolute temperature (PTAT) current source, a bias current source, two resistors and a transistor. The first nonvolatile memory area can be prioritized to expedite a read speed of the memory information and the second nonvolatile memory area can be prioritized in guaranteeing the number of times of rewrite operation of memory information more.read more read lessĪbstract: A bandgap reference circuit capable of operating at low voltage provides an adjustable bandgap reference voltage. When the maximum variation width of the threshold voltage for memorizing information is larger, since stress to a memory cell owing to a rewrite operation of memory information becomes larger, it is inferior in a point of guaranteeing the number of times of rewrite operation however, since a read current becomes larger, a read speed of memory information can be expedited. The first nonvolatile memory area has the maximum variation width of a threshold voltage for memorizing information set larger than that of the second nonvolatile memory area. The nonvolatile memory area has a first nonvolatile memory area and a second nonvolatile memory area, which memorize information depending on the difference of threshold voltages. Abstract: A semiconductor integrated circuit has a central processing unit and a rewritable nonvolatile memory area disposed in an address space of the central processing unit.
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