Breakdown-voltage control circuit
AssigneeRenesas Electronics Corporation
InventorKazuhiro Koudate
Life of this patent
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Abstract
A breakdown-voltage control circuit includes a high voltage monitor circuit and a first voltage switching circuit 1112 connected to the high voltage monitor circuit, the high voltage monitor circuit generating a first reference signal based on an input signal inputted to the high voltage monitor circuit, the first voltage switching circuit comparing a first application voltage applied to the first voltage switching circuit with the first reference signal, outputting the first reference signal as a first control signal when the first application voltage is exceeded, and outputting the first application voltage as the first control signal when the voltage of the first reference signal is less than the first application voltage.
Claims5
A breakdown-voltage control circuit comprising:
- a high voltage monitor circuit;
- a first voltage switching circuit connected to the high voltage monitor circuit;
- and a second voltage switching circuit connected to the high voltage monitor circuit,
- wherein the high voltage monitor circuit generates a first reference signal and a second reference signal based on an output signal of a high voltage output circuit, which is connected to a subsequent stage of the breakdown-voltage control circuit and is fed back and inputted from the high voltage output circuit,
- wherein the first voltage switching circuit:
- compares a first application voltage applied to the first voltage switching circuit with the first reference signal;
- outputs the first reference signal as a first control signal when a voltage of the first reference signal exceeds a first application voltage;
- and outputs the first application voltage as the first control signal when the voltage of the first reference signal is less than the first application voltage,
- wherein the second voltage switching circuit:
- compares a second application voltage applied to the second voltage switching circuit with the second reference signal;
- outputs the second reference signal as a second control signal when a voltage of the second reference signal exceeds the second application voltage;
- and outputs the second application voltage as the second control signal when the voltage of the second reference signal is less than the second application voltage,
- wherein a high level voltage of the second reference signal is higher than the high level voltage of the first reference signal, and
- wherein the first application voltage is lower than the second application voltage.
Dependencies are inferred from the claim text.