HIGH SIDE CURRENT MONITORING APPARATUS
First Claim
1. A high side current monitoring apparatus applied to an input high voltage status to monitor a load current flowing into a load apparatus, the high side current monitoring apparatus comprising:
- a current mirror unit generating a mirrored current and outputting the mirrored current according to the load current;
an active high voltage unit electrically connected to the current mirror unit and receiving the mirrored current;
a bias unit electrically connected to the active high voltage unit, so that the active high voltage unit works in a linear area under the input high voltage status; and
a voltage detection unit generating a voltage detection signal according to the mirrored current,wherein according to the voltage detection signal, the load current is calculated.
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Abstract
A high side current monitoring apparatus monitors a load current flowing into a load apparatus. The high side current monitoring apparatus includes a current mirror unit, an active high voltage unit, a voltage detection unit and a bias unit. The current mirror unit generates a mirrored current and outputs the mirrored current according to the load current. The active high voltage unit is electrically connected to the current mirror unit and receives the mirrored current and works in a linear area to withstand a high voltage. The voltage detection unit is electrically connected to the active high voltage unit and detects a voltage drop across the voltage detection unit and caused by the mirrored current. The bias unit is electrically connected to the active high voltage unit and provides the active high voltage unit with a bias.
8 Citations
10 Claims
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1. A high side current monitoring apparatus applied to an input high voltage status to monitor a load current flowing into a load apparatus, the high side current monitoring apparatus comprising:
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a current mirror unit generating a mirrored current and outputting the mirrored current according to the load current; an active high voltage unit electrically connected to the current mirror unit and receiving the mirrored current; a bias unit electrically connected to the active high voltage unit, so that the active high voltage unit works in a linear area under the input high voltage status; and a voltage detection unit generating a voltage detection signal according to the mirrored current, wherein according to the voltage detection signal, the load current is calculated. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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Specification