Patent ID: 9264022
Filing Date: 2016-02-16
CPC Classification: H03K

Claim Text:
1. A level shift circuit, comprising: a first current control element in which a reverse-phase input signal having a reverse phase to that of an input signal is input to a control terminal and a current amount flowing between first and second terminals is controlled based on voltage of the control terminal; a second current control element in which the input signal or an in-phase input signal which has a same phase as that of the input signal is input to a control terminal and a current amount flowing between first and second terminals is controlled based on voltage of the control terminal of the second current control element; a first load circuit which has one end connected to a high-side power source terminal and the other end connected to the first terminal of the first current control element, and generates a voltage drop according to the current amount flowing between the first and second terminals of the first current control element; a second load circuit which has one end connected to the high-side power source terminal and the other end connected to the first terminal of the second current control element, and generates a voltage drop according to the current amount flowing between the first and second terminals of the second current control element; a current generating circuit which has a first current output terminal connected to the second terminal of the first current control element and a second current output terminal connected to the second terminal of the second current control element, and separately generates a current which flows through each of the first current control element and the second current control element; a comparator in which one of a pair of differential input terminals is connected to the first terminal of the first current control element and the other of the pair of differential input terminals is connected to the first terminal of the second current control element, a power source voltage is supplied from the high-side power source terminal, and a reference voltage is supplied from a high-side reference terminal, and which generates an output signal according to a voltage difference between the pair of differential input terminals; and a voltage suppressing circuit which is connected to the first and second current output terminals separately or commonly and suppresses a voltage rise of each of the first and second current output terminals.