Power saving circuit for wireless pointer

Abstract

A power saving device for wireless pointer comprises a first resistor, a second capacitor, a signal generation circuit, and a bias control circuit comprising 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 first capacitor. Also, once switch is operable to close to cause first capacitor to discharge 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 decreased to a minimum.

Dependencies are inferred from the claim text.