Circuit for switchably connecting an input node and an output node
AssigneeAnalog Devices, Inc.
InventorBarry KINSELLA
Life of this patent
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Abstract
A switching circuit for switchably connecting an input node and an output node. The switching circuit comprises a switch operable to switchably connect the input node to the output node in response to a switching signal. A sensor is provided for sensing the voltage between the input and output nodes and providing a sense signal in response thereto. A driver coupled to the sensor adjusts the switching signal in response to the sense signal.
Claims20
A switching circuit for switchably connecting an input node and an output node, the switching circuit comprising:
- a switch operable to switchably connect the input node to the output node in response to a switching signal, the switch comprising a first transistor coupled in parallel with a second transistor;
- a sensor for sensing a voltage between the input and output nodes and providing a sense signal in response thereto;
- and
- a driver coupled to the sensor, the driver adjusting the switching signal in response to the sense signal.
A method of switchably connecting an input node and an output node, the method comprising the steps of:
- providing a switch operable in response to a switching signal, the switch comprising a first transistor coupled in parallel with a second transistor;
- sensing a voltage at the input and output nodes to provide a sense signal therefrom;
- and
- adjusting the switching signal in response to the sense signal to maintain a constant switch resistance.
A switching circuit for switchably connecting an input node and an output node, the switching circuit comprising:
- a switch operable in response to a drive signal, the switch comprising a first transistor coupled in parallel with a second transistor;
- a sense resistor situated in series with said switch between said input node and output node;
- a potentiometer connected across said input node and output node generating a sense output voltage proportional to a voltage across said input and output nodes;
- and
- a driver responsive to said sense output voltage, said driver providing a drive signal to said switch.
Dependencies are inferred from the claim text.