Patent ID: 6118267
Filing Date: 2000-09-12
Classification: H03K

Abstract:
A dual mode apparatus for alternately supplying a low power reference voltage and a high power reference voltage, said apparatus comprising:a driver which generates said low power reference voltage and directly supplies said low power reference voltage during a standby mode of a receiving unit;an output buffer which receives said low power reference voltage and generates said high power reference voltage therefrom during an active mode of said receiving unit; anda switch which is connected to an output of said drive and said output buffer to provide said high power reference voltage during said active mode, and said low power reference voltage during said stand-by mode, andwherein said switch is a break-before-make mechanism which breaks said connection to said output buffer before making said connection to said driver and which breaks said connection to said driver before making said connection to said output buffer, thereby protecting against disturbances in the line resulting from high impedance and low impedance mismatching.