Abstract: Apparatus, systems, and methods are disclosed that operate to trigger a reference voltage generator from a supply voltage detector, compare an output voltage level from the reference voltage generator with a supply voltage, and to generate an enable signal when the supply voltage is greater than the output voltage level. Additional apparatus, systems, and methods are disclosed.

Abstract: A current mirror circuit includes a first current-mirror transistor coupled to a second current-mirror transistor. A load is coupled to the second current-mirror transistor. A first current source is coupled to the first current-mirror transistor to cause a bias current to flow through the first current-mirror transistor and a second current source is coupled to the second current-mirror transistor and in parallel with the load to shunt the bias current away from the load.

Abstract: A current mirror circuit includes a first current-mirror transistor coupled to a second current-mirror transistor. A load is coupled to the second current-mirror transistor. A first current source is coupled to the first current-mirror transistor to cause a bias current to flow through the first current-mirror transistor and a second current source is coupled to the second current-mirror transistor and in parallel with the load to shunt the bias current away from the load.

Abstract: Apparatus, systems, and methods are disclosed that operate to trigger a reference voltage generator from a supply voltage detector, compare an output voltage level from the reference voltage generator with the a supply voltage, and to generate an enable signal when the supply voltage is greater than the output voltage level. Additional apparatus, systems, and methods are disclosed.

Abstract: A fast power-on band-gap reference circuit includes a buffer, a first band-gap logic, and a second high drive band-gap logic. During power-on of the band-gap reference circuit, both the first band-gap logic and the second high drive band-gap logic are activated, in which the first band-gap logic charges an output of the first band-gap logic and the second high drive band-gap logic charges a capacitance associated with an output of the band-gap reference circuit. When the output of the first band-gap logic reaches a predetermined value, the second high drive band-gap logic is deactivated and the output of the first band-gap logic is couple to the output of the band-gap reference circuit through the buffer.

Abstract: A fast power-on band-gap reference circuit includes a band-gap logic and a band-gap dummy logic. During power-on, both the band-gap logic and the band-gap dummy logic are activated and charges the capacitance of a band-gap line. When an output of the band-gap logic reaches a predetermined value, the band-gap dummy logic is deactivated. Thus, the band-gap dummy logic, with a high drive capability, charges the band-gap capacitance at the same time the band-gap logic starts to generate the compensate temperature voltage. In this manner, the band-gap reference circuit reaches its stable, functional state faster than conventional circuits, in the range of a few microseconds.