Electronic oscillator circuit and a method for controlling an oscillation frequency of a ring oscillator circuit
AssigneeLogistics and Supply Chain MultiTech R&D Centre Limited
InventorsFeng Lu, Jing Jung Tang
Life of this patent
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Abstract
An electronic oscillator circuit and a method for controlling an oscillation frequency of a ring oscillator circuit. The circuit includes a plurality of inverter stages each Including an inverter and a trans-resistance switch circuit configured to switch on the inverter during an operation of the electronic oscillator circuit thereby facilitating the inverter to generate an inverter output signal in response to an inverter input signal fed to the inverter; wherein the inverters in the plurality of the inverter stages are connected to form a ring oscillator circuit.
Claims14
An electronic oscillator circuit comprising:
- a plurality of inverter stages each comprises an inverter and a trans-resistance switch circuit configured to switch on the inverter during an operation of the electronic oscillator circuit thereby facilitating the inverter to generate an inverter output signal in response to an inverter input signal fed to the inverter;
- wherein the inverters in the plurality of the inverter stages are connected to form a ring oscillator circuit;
- wherein the trans-resistance switch circuit comprises at least one pair of trans-resistance switches arranged to respectively connect the inverter in the same inverter stage to a VDD node and a VSS node of the electronic oscillator circuit;
- wherein the inverter in each of the inverter stage is switched on only when the inverter is electrically connected to the VDD node and the VSS node via a complete circuit path formed by the trans-resistance switch circuit;
- and
- wherein the trans-resistance switch circuit comprises a plurality of pairs of cascaded trans-resistance switches, including a first set of trans-resistance switches connected in series between the inverter and the VDD node, and a second set of trans-resistance switches connected in series between the inverter and the VSS node.
An electronic oscillator circuit comprising:
- a plurality of inverter stages each comprises an inverter and a trans-resistance switch circuit configured to switch on the inverter during an operation of the electronic oscillator circuit thereby facilitating the inverter to generate an inverter output signal in response to an inverter input signal fed to the inverter;
- wherein the inverters in the plurality of the inverter stages are connected to form a ring oscillator circuit;
- wherein the trans-resistance switch circuit comprises at least one pair of trans-resistance switches arranged to respectively connect the inverter in the same inverter stage to a VDD node and a VSS node of the electronic oscillator circuit;
- wherein each of the at least one pair of trans-resistance switches comprises a P-channel transistor arranged to connect the inverter to the VDD node and an N-channel transistor arranged to connected the inverter to the VSS node;
- and
- wherein each of the P-channel transistor and the N-channel transistor are controlled by a trans-resistance switch input signal via a diode circuit.
A method for controlling an oscillation frequency of a ring oscillator circuit, comprising the step of:
- providing a plurality of inverter stages each comprises an inverter and a trans-resistance switch circuit configured to switch on the inverter during an operation of the ring oscillator circuit;
- and
- facilitating the inverter to generate an inverter output signal in response to an inverter input signal fed to the inverter;
- wherein the trans-resistance switch circuit comprises at least one pair of trans-resistance switches arranged to respectively connect the inverter in the same inverter stage to a VDD node and a VSS node of the ring oscillator circuit;
- wherein the inverter in each of the inverter stage is switched on only when the inverter is electrically connected to the VDD node and the VSS node via a complete circuit path formed by the trans-resistance switch circuit;
- and
- wherein the trans-resistance switch circuit comprises a plurality of pairs of cascaded trans-resistance switches, including a first set of trans-resistance switches connected in series between the inverter and the VDD node, and a second set of trans-resistance switches connected in series between the inverter and the VSS node.
Dependencies are inferred from the claim text.