Load driving circuit

Abstract

Abstract PURPOSE:To drive surely a load with one kind of power source, by boosting a binary signal which is supplied to an input terminal by a boosting circuit to control a semiconductor driving element in follower-connection and lowering the on-state resistance of the semiconductor driving element. CONSTITUTION:A binary signal (a) for switching control is supplied to an input terminal 4. An output (b) of an oscillating circuit 5 is subjected to gate control in a NAND gate 6 by the signal (a), and a charge pump circuit 7 is driven by an output (c). An inverter 8 of the circuit 7 repeats the inverting operation in a high speed by the output (c). In accordance with this inversion, charge to a capacitor 9 through a diode 10 and discharge of the capacitor 9 through a diode 11 are repeated. The electric charge of the capacitor 9 is supplied to a follower- connected transistor TR13 through a resistance 12. As the result, the TR13 is driven with a double voltage of a power source voltage +VDD.

Inventors

• 👤 Takeshi Oguro
• 👤 大黒　健
• 👤 Kazuyoshi Okada
• 👤 和義 岡田

Bibliographic Details