초록 ▼

A decision circuit compares an input voltage with a reference voltage and judges whether the input voltage is at least equal to the reference voltage. A controller in the decision circuit detects whether the input voltage or reference voltage is at least equal to the setting voltage. When both the i

A decision circuit compares an input voltage with a reference voltage and judges whether the input voltage is at least equal to the reference voltage. A controller in the decision circuit detects whether the input voltage or reference voltage is at least equal to the setting voltage. When both the input voltage and the reference voltage are lower than a setting voltage, which represents an operating voltage of the decision circuit, a first bias-supply circuit adds a predetermined bias voltage to the input voltage and supplies a level-shifted input voltage to the decision circuit. Similarly, a second bias-supply circuit adds the predetermined bias voltage to the reference voltage and supplies a level-shifted reference voltage to the decision circuit. Therefore, the decision circuit compares the level-shifted input voltage with the level-shifted reference voltage.

대표청구항 ▼

A decision circuit, comprising: a first comparator which compares an input voltage with a reference voltage and judges whether said input voltage is higher than said reference voltage; a controller for controlling a level of bias voltage added to each of said input voltage and said reference voltage

A decision circuit, comprising: a first comparator which compares an input voltage with a reference voltage and judges whether said input voltage is higher than said reference voltage; a controller for controlling a level of bias voltage added to each of said input voltage and said reference voltage in response to levels of said input voltage and said reference voltage; and a generator which generates at least two levels of said bias voltage, said controller controlling which of said levels of said bias voltage is added to said input and reference voltages; wherein said controller comprises: a second comparator which compares said input voltage with a predetermined voltage; and a third comparator which compares said reference voltage with said predetermined voltage.