Shunt termination path
First Claim
1. A method of operating an electrical circuit, comprising:
- providing a first control signal to a gate of each of a plurality of transistors coupled in series between an electrical path and a termination transistor, wherein a corresponding resistance is coupled between a source and a drain of each of the plurality of transistors, another resistance is coupled between a source and a drain of the termination transistor, the termination transistor is coupled in series between the plurality of transistors and ground, and the plurality of transistors and corresponding resistances and the termination transistor and corresponding other resistance form a configurable shunt between the electrical path and ground;
providing a second control signal to a gate of the termination transistor; and
dynamically and independently controlling the first and second control signals to configure the shunt to a desired termination state for the electrical path.
1 Assignment
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Accused Products
Abstract
Certain aspects of the present disclosure generally relate to electronic circuits and, more particularly, to a switch architecture including a shunt termination path, for example to provide isolation between two terminals. More particularly, aspects of the present disclosure relate to methods for operating a shunt path to achieve various termination states. An exemplary method generally includes providing a first control signal to a plurality of transistors coupled in series between an electrical path and a termination transistor, wherein the termination transistor is coupled in series between the plurality of transistors and ground, providing a second control signal to the termination transistor, and dynamically controlling the first and second control signals to achieve a desired termination state for the electrical path.
58 Citations
26 Claims
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1. A method of operating an electrical circuit, comprising:
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providing a first control signal to a gate of each of a plurality of transistors coupled in series between an electrical path and a termination transistor, wherein a corresponding resistance is coupled between a source and a drain of each of the plurality of transistors, another resistance is coupled between a source and a drain of the termination transistor, the termination transistor is coupled in series between the plurality of transistors and ground, and the plurality of transistors and corresponding resistances and the termination transistor and corresponding other resistance form a configurable shunt between the electrical path and ground; providing a second control signal to a gate of the termination transistor; and dynamically and independently controlling the first and second control signals to configure the shunt to a desired termination state for the electrical path. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. An apparatus, comprising:
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an electrical path; a plurality of transistors coupled to the electrical path; a corresponding plurality of resistors, each of the plurality of resistors coupled between a drain and a source of a corresponding one of the plurality of transistors, a termination transistor; a termination resistor coupled between a drain and a source of the termination transistor, wherein the plurality of transistors and corresponding resistors are coupled in series between the electrical path and the termination transistor with corresponding termination resistor, and the termination transistor with corresponding termination resistor is coupled in series between the plurality of transistors and ground to form a configurable shunt; a source of a first control signal configured to be selectively applied to gates of the plurality of transistors; and a source of a second control signal configured to be selectively applied to a gate of the termination transistor, the first and second control signals being dynamically and independently controllable to achieve a desired termination state for the electrical path. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16)
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17. An apparatus for operating an electrical circuit, comprising:
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means for providing a first control signal to a plurality of transistors coupled in series between an electrical path and a termination transistor, each of the plurality of transistors and the termination transistor being coupled across a corresponding resistance, wherein the termination transistor with corresponding resistance is coupled in series between the plurality of transistors with corresponding resistances and ground to form a configurable shunt; means for providing a second control signal to the termination transistor; and means for dynamically and independently controlling the first and second control signals to achieve a desired termination state for the electrical path. - View Dependent Claims (18, 19, 20, 21)
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22. A switch, comprising:
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a stack of transistors in shunt with a signal path; a plurality of resistors, each resistor being coupled between a source and a drain of a respective transistor in the stack of transistors; and a selectively bypassable terminating impedance coupled between the stack of transistors and ground, the terminating impedance being selectively bypassable independent of any control of the stack of transistors. - View Dependent Claims (23, 24, 25, 26)
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Specification