Circuit for generating a voltage waveform
First Claim
1. A circuit for generating a voltage waveform at an output node, the circuit including:
- a single voltage rail connected to the output node via a voltage rail switch;
an anchor node connected to the output node via an inductor and a bidirectional switch, wherein the bidirectional switch includes two or more transistors connected in series; and
a control unit configured to change the voltage at the output node by controlling the voltage rail switch and the bidirectional switch so that, if a load capacitance is connected to the output node, a resonant circuit is established between the inductor and the load capacitance;
wherein the control unit of the circuit is configured to control the circuit to operate according to a control method including;
opening the bidirectional switch and closing the voltage rail switch so that the output node is clamped at the voltage of the voltage rail;
causing the voltage at the output node to swing towards a floating voltage by opening the voltage rail switch and closing the bidirectional switch so that a resonant circuit is established between the inductor and the load capacitance;
opening the bidirectional switch without closing the voltage rail switch so that the output node is held at the floating voltage without being clamped at the voltage of any voltage rail;
causing the voltage at the output node to swing towards the voltage of the voltage rail by closing the bidirectional switch so that a resonant circuit is established between the inductor and the load capacitance.
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Accused Products
Abstract
A circuit for generating a voltage waveform at an output node. The circuit includes a voltage rail connected to the output node via a voltage rail switch; an anchor node connected to the output node via an inductor and a bidirectional switch, wherein the bidirectional switch includes two or more transistors connected in series; and a control unit configured to change the voltage at the output node by controlling the voltage rail switch and the bidirectional switch so that, if a load capacitance is connected to the output node, a resonant circuit is established between the inductor and the load capacitance. The circuit may be included in an apparatus for use in processing charged particles, e.g. for use in performing mass spectrometry or ion mobility spectrometry.
15 Citations
15 Claims
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1. A circuit for generating a voltage waveform at an output node, the circuit including:
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a single voltage rail connected to the output node via a voltage rail switch; an anchor node connected to the output node via an inductor and a bidirectional switch, wherein the bidirectional switch includes two or more transistors connected in series; and a control unit configured to change the voltage at the output node by controlling the voltage rail switch and the bidirectional switch so that, if a load capacitance is connected to the output node, a resonant circuit is established between the inductor and the load capacitance; wherein the control unit of the circuit is configured to control the circuit to operate according to a control method including; opening the bidirectional switch and closing the voltage rail switch so that the output node is clamped at the voltage of the voltage rail; causing the voltage at the output node to swing towards a floating voltage by opening the voltage rail switch and closing the bidirectional switch so that a resonant circuit is established between the inductor and the load capacitance; opening the bidirectional switch without closing the voltage rail switch so that the output node is held at the floating voltage without being clamped at the voltage of any voltage rail; causing the voltage at the output node to swing towards the voltage of the voltage rail by closing the bidirectional switch so that a resonant circuit is established between the inductor and the load capacitance. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A circuit for generating a voltage waveform at an output node, the circuit including:
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a single voltage rail connected to the output node via a voltage rail switch; an anchor node connected to the output node via an inductor and a bidirectional switch, wherein the bidirectional switch includes two or more transistors connected in series; and a control unit configured to change the voltage at the output node by controlling the voltage rail switch and the bidirectional switch so that, if a load capacitance is connected to the output node, a resonant circuit is established between the inductor and the load capacitance; wherein the control unit of the circuit is configured to control the circuit to operate according to a control method including; opening the bidirectional switch and closing the voltage rail switch so that the output node is clamped at the voltage of the voltage rail; causing the voltage at the output node to swing away from and immediately back towards the voltage of the voltage rail by opening the first voltage rail switch and closing the bidirectional switch so that a resonant circuit is established between the inductor and the load capacitance. - View Dependent Claims (11, 12, 13)
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14. A method of controlling a circuit that includes:
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a single voltage rail connected to the output node via a voltage rail switch; an anchor node connected to the output node via an inductor and a bidirectional switch, wherein the bidirectional switch includes two or more transistors connected in series; and a control unit configured to change the voltage at the output node by controlling the voltage rail switch and the bidirectional switch so that, if a load capacitance is connected to the output node, a resonant circuit is established between the inductor and the load capacitance; wherein the method includes a controlling the circuit to operate according to any one of the following control methods; a first control method that includes; opening the bidirectional switch and closing the voltage rail switch so that the output node is clamped at the voltage of the voltage rail; causing the voltage at the output node to swing towards a floating voltage by opening the voltage rail switch and closing the bidirectional switch so that a resonant circuit is established between the inductor and the load capacitance; opening the bidirectional switch without closing the voltage rail switch so that the output node is held at the floating voltage without being clamped at the voltage of any voltage rail; causing the voltage at the output node to swing towards the voltage of the voltage rail by closing the bidirectional switch so that a resonant circuit is established between the inductor and the load capacitance a second control method that includes; opening the bidirectional switch and closing the voltage rail switch so that the output node is clamped at the voltage of the voltage rail; causing the voltage at the output node to swing away from and immediately back towards the voltage of the voltage rail by opening the first voltage rail switch and closing the bidirectional switch so that a resonant circuit is established between the inductor and the load capacitance.
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15. A computer-readable medium having computer-executable instructions configured to control a circuit that includes:
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a voltage rail connected to the output node via a voltage rail switch; an anchor node connected to the output node via an inductor and a bidirectional switch, wherein the bidirectional switch includes two or more transistors connected in series; and a control unit configured to change the voltage at the output node by controlling the voltage rail switch and the bidirectional switch so that, if a load capacitance is connected to the output node, a resonant circuit is established between the inductor and the load capacitance; wherein the computer-executable instructions are configured to control the circuit to operate according to any one of the following control methods; a first control method that includes; opening the bidirectional switch and closing the voltage rail switch so that the output node is clamped at the voltage of the voltage rail; causing the voltage at the output node to swing towards a floating voltage by opening the voltage rail switch and closing the bidirectional switch so that a resonant circuit is established between the inductor and the load capacitance; opening the bidirectional switch without closing the voltage rail switch so that the output node is held at the floating voltage without being clamped at the voltage of any voltage rail; causing the voltage at the output node to swing towards the voltage of the voltage rail by closing the bidirectional switch so that a resonant circuit is established between the inductor and the load capacitance a second control method that includes; opening the bidirectional switch and closing the voltage rail switch so that the output node is clamped at the voltage of the voltage rail; causing the voltage at the output node to swing away from and immediately back towards the voltage of the voltage rail by opening the first voltage rail switch and closing the bidirectional switch so that a resonant circuit is established between the inductor and the load capacitance.
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Specification