초록 ▼

A temperature dependent current generating circuit includes a circuitry for producing a first voltage that is substantially constant over temperature, circuitry for producing a second voltage that increases with increasing temperature, wherein the second voltage intersects the first voltage at a pre

A temperature dependent current generating circuit includes a circuitry for producing a first voltage that is substantially constant over temperature, circuitry for producing a second voltage that increases with increasing temperature, wherein the second voltage intersects the first voltage at a predefined temperature, and a comparator circuit receiving the first and second voltages. The comparator circuit is responsive to the first and second voltages to source a compensation current below the predefined temperature; i.e., when the second voltage is below the first voltage, and to sink the compensation current above the predefined temperature; i.e., when the second voltage is above the first voltage. A current generating circuit is operable to divert the compensation current away therefrom at temperatures below the predefined temperature and to produce a charging current at such temperatures only as a function of a base charging current, and to draw the compensation current away from the base charging current at temperatures above the predefined temperature so that the charging current is a decreasing function of temperature at such temperatures.

대표청구항 ▼

1. A temperature dependent current generating circuit, comprising:a first circuit producing a first voltage that is substantially constant over a range of temperatures; a second circuit producing a second voltage as an increasing function of temperature over said range of temperatures; a third curre

1. A temperature dependent current generating circuit, comprising:a first circuit producing a first voltage that is substantially constant over a range of temperatures; a second circuit producing a second voltage as an increasing function of temperature over said range of temperatures; a third current producing a charging current; and a comparator circuit responsive to said first and second voltages to draw a compensation current away from said charging current when said second voltage increases with temperature above said first voltage, said compensation current increasing with increasing temperature over said range of temperatures.