Back to results
US 2026/0303032 A1Published application
Ring amplifier
AssigneeNXP USA, Inc.
InventorMichael Todd Berens
Life of this patent
Estimating the term…
Abstract
A ring amplifier includes a first transistor having a gate coupled via a first capacitor to an output node of a first stage, and a current electrode coupled to the gate of the first transistor via a first switch and to a first output of a second stage. A second transistor has a current electrode coupled to the first output, and a gate coupled via a second capacitor to the output node and to a first bias via a second switch. A third transistor has a current electrode coupled to a second output of the second stage, and a gate coupled via a third capacitor to the output node and to a second bias via a third switch. A fourth transistor has a current electrode coupled to the second output, and a gate coupled via a fourth capacitor to the output and to the fourth transistor via a fourth switch.
Claims20
A ring amplifier coupled to receive an input voltage and configured provide an output voltage, the ring oscillator comprising:
- a first inverter stage having a ring amplifier input node coupled to receive the input voltage and an output node;
- a second inverter stage comprising:
- a first transistor of a first conductivity type having a first current electrode coupled to a first voltage supply terminal, a control electrode coupled via a first capacitor to the output node of the first inverter stage, and a second current electrode coupled to the control electrode of the first transistor via a first switch and to a first output node of the second inverter stage;
- a second transistor of a second conductivity type opposite the first conductivity type having a first current electrode coupled to the first output node of the second inverter stage, a second current electrode coupled to a second voltage supply terminal, and a control electrode coupled via a second capacitor to the output node of the first inverter stage and coupled to receive a first bias voltage via a second switch;
- a third transistor of the first conductivity type having a first current electrode coupled to the first voltage supply terminal, a second current electrode coupled to a second output node of the second inverter stage, and a control electrode coupled via a third capacitor to the output node of the first inverter stage and coupled to receive a second bias voltage via a third switch;
- and
- a fourth transistor of the second conductivity type having a first current electrode coupled to the second output node of the second inverter stage, a second current electrode coupled to the second voltage supply terminal, and a control electrode coupled via a fourth capacitor to the output node of the first inverter stage and coupled to the second current electrode of the fourth transistor via a fourth switch;
- and
- a third inverter stage coupled to the first and second output nodes of the second inverter stage and configured to provide the output voltage at a ring amplifier output node.
6 more elements
A ring amplifier coupled to receive an input voltage and configured provide an output voltage, the ring oscillator comprising:
- a first inverter stage comprising:
- a first transistor of a first conductivity type having a first current electrode coupled to a first voltage supply terminal, a second current electrode coupled to an output node of the first inverter stage, and a control electrode coupled via a first switch to a first bias voltage and coupled via a first capacitor to a ring amplifier input node coupled to receive the input voltage;
- and
- a second transistor of a second conductivity type having a first current electrode coupled to the output node of the first inverter stage, a second current electrode coupled to a second voltage supply terminal, and a control electrode coupled via a second switch to a second bias voltage and coupled via a second capacitor to the ring amplifier input node;
- a second inverter stage comprising:
- a third transistor of the first conductivity type having a first current electrode coupled to the first voltage supply terminal, a control electrode coupled via a third capacitor to the output node of the first inverter stage, and a second current electrode coupled to the control electrode of the third transistor via a third switch and to a first output node of the second inverter stage;
- a fourth transistor of the second conductivity type opposite the first conductivity type having a first current electrode coupled to the first output node of the second inverter stage, a second current electrode coupled to the second voltage supply terminal, and a control electrode coupled via a fourth capacitor to the output node of the first inverter stage and coupled to receive the second bias voltage via a fourth switch;
- a fifth transistor of the first conductivity type having a first current electrode coupled to the first voltage supply terminal, a second current electrode coupled to a second output node of the second inverter stage, and a control electrode coupled via a fifth capacitor to the output node of the first inverter stage and coupled to receive the first bias voltage via a fifth switch;
- and
- a sixth transistor of the second conductivity type having a first current electrode coupled to the second output node of the second inverter stage, a second current electrode coupled to the second voltage supply terminal, and a control electrode coupled via a sixth capacitor to the output node of the first inverter stage and coupled to the second current electrode of the sixth transistor via a sixth switch;
- and
- a third inverter stage coupled to the first and second output nodes of the second inverter stage and configured to provide the output voltage at a ring amplifier output node.
9 more elements
Dependencies are inferred from the claim text.