Importance

Loading Importance Indicators...

Abstract

A power saving device for a wireless pointer includes a first resistor, a second capacitor, a signal generation circuit, and a bias control circuit including an n-type channel MOSFET having a drain connected to the signal generation circuit at a second node for driving the signal generation circuit, a switch having one end connected to a gate of the n-type channel MOSFET at a first node, a semiconductor means having an anode connected to the gate of the n-type channel MOSFET at the first node and a cathode connected to the positive terminal of the power source, and a first capacitor in series connection with the semiconductor means. When wireless pointer is inoperative, then the switch will open automatically to cause the leakage current of the reverse biased semiconductor means to charge the first capacitor. When the switch is closed, the first capacitor discharges completely so as to cut off the n-type channel MOSFET. The charging and discharging decrease the current consumption of the wireless pointer in standby to a minimum.

Loading the Abstract Image...

First Claim