A buffer amplifier has a power on state and a sleep state. During regular operation a coupling state of a load to an output node is detected using feedback voltage. In a sleep mode and in a power collapse mode a detection current is injected into the output node, to produce a voltage, and the coupling state of the load is detected from the voltage. Optionally, the detection current and detecting of the voltage on the output node is enables by a low duty cycle clock. Optionally, signals generated in detecting the coupling state are qualified through a debounce circuit.
申请公布号
WO2013044263(A2)
申请公布日期
2013.03.28
申请号
WO2012US56963
申请日期
2012.09.24
申请人
QUALCOMM INCORPORATED;CHIABURU, LIVIU;TALEIE, SHAHIN MEHDIZAH;SEO, DONGWON;SILVERSTEIN, ROY B.
发明人
CHIABURU, LIVIU;TALEIE, SHAHIN MEHDIZAH;SEO, DONGWON;SILVERSTEIN, ROY B.