US 10,651,841 B2 · Ring amplitude measurement and mitigation

Abstract

An apparatus includes a voltage divider circuit including a plurality of series-connected capacitors and including an input terminal of one of the capacitors configured to receive a first voltage from a switch, and a ring node comprising the connection between at least two of the series-connected capacitors. The apparatus further includes a negative clamp circuit coupled to the ring node of the voltage divider circuit and a bias voltage node. The bias voltage node is configured to receive a bias voltage and responsive to a ring voltage on the ring node being less than the bias voltage, the negative clamp circuit is configured to clamp the ring voltage at a first threshold voltage. The apparatus also includes a peak detector circuit coupled to the ring node of the voltage divider circuit and configured to detect a peak amplitude of the ring voltage. The apparatus further includes a switch driver coupled to the peak detector circuit and configured to adjust a control signal to the switch responsive to the detected peak amplitude.

Claims15

Dependent claims

Apparatus, comprising:

a voltage divider circuit including first and second capacitors, the first capacitor having first and second terminals, the second capacitor having third and fourth terminals, the second terminal coupled to the third terminal, and the first terminal adapted to be coupled to a voltage terminal of a switch;
a negative clamp circuit coupled between the third and fourth terminals, the negative clamp circuit configured to clamp the third terminal at a threshold voltage responsive to the third terminal having less than the threshold voltage;
a peak detector circuit having a peak detector input and a detected peak amplitude output, the peak detector input coupled to the third terminal;
and
a switch driver having a detected peak amplitude input and a control output, the detected peak amplitude input coupled to the detected peak amplitude output, and the control output adapted to be coupled to a control terminal of the switch.

2 more elements

Apparatus, comprising:

a voltage divider circuit including first and second impedance devices, the first impedance device having first and second terminals, the second impedance device having third and fourth terminals, the second terminal coupled to the third terminal, and the first terminal adapted to be coupled to a voltage terminal of a switch;
a negative clamp circuit coupled between the third and fourth terminals, the negative clamp circuit configured to clamp the third terminal at a threshold voltage;
a peak detector circuit having a peak detector input and a detected peak amplitude output, the peak detector input coupled to the third terminal;
a comparator having a comparator input and a comparator output, the comparator input coupled to the detected peak amplitude output, and the comparator configured to generate a comparator output signal at the comparator output responsive to a comparison by the comparator of a reference voltage to a detected peak amplitude at the comparator input;
an output terminal adapted to be coupled to a control terminal of the switch;
and
a digital controller coupled between the comparator output and the output terminal.

4 more elements

Dependencies are inferred from the claim text.

Ring amplitude measurement and mitigation

Life of this patent

Ring amplitude measurement and mitigation

Life of this patent

Abstract

Claims15