Patent ID: 8054596
Filing Date: 2011-11-08
Classification: G02F,H01L

Abstract:
1. A semiconductor device comprising: a first potential supply terminal to which a first potential is applied; a second potential supply terminal to which a second potential is applied; a voltage divider including a first resistor and a diode group including diodes of N pieces (N is a natural number) of stages each having an anode and a cathode for dividing voltage between the first potential supply terminal and the second potential supply terminal and generating a divided potential corresponding to the divided voltage; a control circuit comprising a second resistor and a transistor including a first terminal serving as a control terminal, a second terminal, and a third terminal for generating a control potential in accordance with the divided voltage; a bypass circuit including a third resistor and a switching element electrically connected in parallel to the third resistor; and a functional circuit including a first input terminal and a second input terminal, wherein an anode of a diode in a first stage is electrically connected to the first potential supply terminal through the first resistor, an anode of a diode in a Kth stage (K is a natural number of any one of 2 to N−1) is electrically connected to a cathode of a diode in a K−1th stage, an anode of a diode in an Nth stage is electrically connected to a cathode of a diode in an N−1th stage, and a cathode of the diode in the Nth stage is electrically connected to the second potential supply terminal, wherein the first terminal of the transistor is electrically connected to one cathode of the diodes in 1 to Kth stages, wherein on/off of the switching element is controlled in accordance with the control potential, wherein the first input terminal is electrically connected to the first potential supply terminal through the switching element and the third resistor, and wherein the second input terminal is electrically connected to the second potential supply terminal.