GaN circuit drivers for GaN circuit loads
An electronic circuit is disclosed. The electronic circuit includes a GaN substrate, a first power supply node on the substrate, an output node, a signal node, and an output component on the substrate, where the output component is configured to generate a voltage at the output node based at least in part on a voltage at the signal node. The electronic circuit also includes a capacitor coupled to the signal node, where, the capacitor is configured to selectively cause the voltage at the signal node to be greater than the voltage of the first power supply node, such that the output component causes the voltage at the output node to be substantially equal to the voltage of the first power supply node.
1. An electronic circuit, comprising:
a substrate comprising GaN;
a first power supply node on the substrate;
an output node;
a signal node;
an output component on the substrate, wherein the output component is configured to selectively conduct current from the first power supply node to the output node based at least in part on a voltage at the signal node;
a resistive element; and
a capacitor coupled to the signal node through the resistive element, wherein the capacitor is configured to selectively cause the voltage at the signal node to be greater than the voltage of the first power supply node, such that the output component causes the voltage at the output node to be substantially equal to the voltage of the first power supply node.
2. The electronic circuit of claim 1 , wherein the output component comprises:
a first terminal coupled to the first power supply node;
a second terminal coupled to the output node, and
a third terminal coupled to the signal node, wherein a voltage at the third terminal controls an electrical conductivity between the first and second terminals of the output component.
3. The electronic circuit of claim 1 , further comprising a charging element configured to charge the capacitor while the capacitor does not cause the voltage at the signal node to be greater than the voltage of the first power supply node.
4. The electronic circuit of claim 1 , wherein the capacitor causes the voltage at the signal node to be greater than the voltage of the first power supply node in response to the voltage at the output node increasing.
5. The electronic circuit of claim 1 , further comprising first and second input nodes, wherein the voltage generated at the output node is a logic function of at least the voltages at the first and second input nodes.
6. The electronic circuit of claim 1 , further comprising a pull-down device coupled to the signal node.
7. The electronic circuit of claim 6 , further comprising:
a charging element configured to charge the capacitor while the capacitor does not cause the voltage at the signal node to be greater than the voltage of the first power supply node,
wherein the resistive element is coupled between the charging element and the pull-down device.
8. The electronic circuit of claim 1 , further comprising:
an input node; and
a feedback element between the input node and the output node,
wherein the voltage generated at the output node is based on a voltage at the input node, and wherein the relationship between voltage at the input node and the voltage at the output node is hysteretic.
9. The electronic circuit of claim 1 , further comprising a power switch formed on the substrate including a control gate coupled to the output node.
10. The electronic circuit of claim 1 , wherein the electronic circuit comprises two inverters connected serially to form a non-inverting buffer circuit.
11. The electronic circuit of claim 1 , further comprising an input node, wherein the voltage generated at the output node is a logic inversion of the input node.
12. An electronic component, comprising:
a package base;
at least one GaN-based die secured to the package base and including
an electronic circuit comprising:
a first power supply node on the GaN-based die;
an output node;
a signal node;
an output component on the GaN-based die, wherein the output component is configured to selectively conduct current from the first power supply node to the output node based at least in part on a voltage at the signal node;
a resistive element; and
a capacitor coupled to the signal node through the resistive element, wherein the capacitor is configured to selectively cause the voltage at the signal node to be greater than the voltage of the first power supply node, such that the output component causes the voltage at the output node to be substantially equal to the voltage of the first power supply node.
13. The electronic component of claim 12 , wherein the output component comprises:
a first terminal coupled to the first power supply node;
a second terminal coupled to the output node, and
a third terminal coupled to the signal node, wherein a voltage at the third terminal controls an electrical conductivity between the first and second terminals of the output component.
14. The electronic component of claim 12 , wherein the electronic circuit further comprises a charging element configured to charge the capacitor while the capacitor does not cause the voltage at the signal node to be greater than the voltage of the first power supply node.
15. The electronic component of claim 12 , wherein the capacitor causes the voltage at the signal node to be greater than the voltage of the first power supply node in response to the voltage at the output node increasing.
16. The electronic component of claim 12 , wherein the electronic circuit further comprises first and second input nodes, wherein the voltage generated at the output node is a logic function of at least the voltages at the first and second input nodes.
17. The electronic component of claim 12 , further comprising a pull-down device coupled to the signal node.
18. The electronic component of claim 17 , wherein the electronic circuit further comprises:
a charging element configured to charge the capacitor while the capacitor does not cause the voltage at the signal node to be greater than the voltage of the first power supply node; and
a resistive element coupled between the charging element and the pull-down device.
19. The electronic component of claim 12 , wherein the electronic circuit further comprises:
an input node; and
a feedback element between the input node and the output node,
wherein the voltage generated at the output node is based on a voltage at the input node, and wherein the relationship between voltage at the input node and the voltage at the output node is hysteretic.
20. The electronic component of claim 12 , wherein the electronic circuit further comprises a power switch formed on the GaN-based die including a control gate coupled to the output node.
21. The electronic component of claim 12 , wherein the electronic circuit comprises two inverters connected serially to form a non-inverting buffer circuit.
22. The electronic component of claim 12 , wherein the electronic circuit further comprises an input node, wherein the voltage generated at the output node is a logic inversion of the input node.
23. The electronic circuit of claim 1 , further comprising:
a charging element configured to charge the capacitor while the capacitor does not cause the voltage at the signal node to be greater than the voltage of the first power supply node, wherein the charging element comprises a selectively conductive charging switch configured to conduct while the capacitor does not cause the voltage at the signal node to be greater than the voltage of the first power supply node.
24. The electronic component of claim 12 , wherein the electronic circuit further comprises:
a charging element configured to charge the capacitor while the capacitor does not cause the voltage at the signal node to be greater than the voltage of the first power supply node, wherein the charging element comprises a selectively conductive charging switch configured to conduct while the capacitor does not cause the voltage at the signal node to be greater than the voltage of the first power supply node.