VOLTAGE DETECTION CIRCUIT

摘要

PROBLEM TO BE SOLVED: To provide a voltage detection circuit having a small occupancy area capable of reducing a product in size and manufacturing costs.SOLUTION: A voltage detection part 1 includes: an upper side n type depression MOSFET (Q1); a lower side n type depression MOSFET (Q2) serially connected to the Q1; and a high potential side 2 of a power source 20 connected to a drain 11 of the Q1. A source 12 of the Q1 and a drain 13 of the Q2 are connected via a connection point A, and a source 14 of the Q2 is connected to a ground 3. Also, gates 15 and 16 of the Q1 and Q2 are respectively connected to sources 12 and 14 of the Q1 and Q2. The connection point A of the Q1 and Q2 is connected to the input of an inverter 4. The voltage detection part 1 includes two depression MOSFET, and the connection point A is directly connected to the inverter so that the number of components can be reduced, and that the occupancy area of a voltage detection circuit can be made small.