Patent ID: 9312845
Filing Date: 2016-04-12
CPC Classification: H03K

Claim Text:
1. A semiconductor device that performs, from among a high-potential-side switching element and a low-potential-side switching element, which are connected in series and which are interposed between a high-potential main power supply potential and a low-potential main power supply potential, drive control of the high-potential-side switching element, the semiconductor device comprising: only one level shift circuit that receives a single line input signal of a low-side region operating in a low-voltage potential system, and outputs a single line output as a signal of a high-side region operating in a high-voltage potential system, upon raising a signal level; a pulse modulation circuit that operates in a low-side region, generates a data symbol constituted by 2 or more bits and representing a set signal or a reset signal, and outputs the generated data symbol as the single line input signal of the level shift circuit; a pulse demodulation circuit that operates in a high-side region, demodulates the data symbol outputted from the level shift circuit, and generates a level-shifted set signal or reset signal; and a control circuit that controls conduction/non-conduction of the high-potential-side switching element on the basis of the level-shifted set signal or reset signal outputted from the pulse demodulation circuit.