Low power single-rail-input voltage level shifter
First Claim
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1. A voltage level shifter, comprising:
- a single-rail input connected to a low-voltage domain; and
a voltage-transition circuit connected to the single-rail input, the voltage-transition circuit being configured to convert a voltage of the low-voltage domain received via the single-rail input to a voltage of a high-voltage domain;
wherein the voltage-transition circuit includes an input-falling-transition circuit, the input-falling-transition circuit comprising;
a first p-type transistor; and
a first n-type transistor having a drain connected to a drain of the first p-type transistor at an input contact point, the first n-type transistor having a source connected to the single-rail input, the first n-type transistor having a gate connected to a reference voltage, the first p-type transistor having a source connected to a VDDH voltage of the high-voltage domain;
wherein the voltage-transition circuit includes an input-rising-transition circuit, the input-rising-transition circuit comprising;
a second n-type transistor having a gate connected to the single-rail input, the second n-type transistor having a source connected to a ground voltage, the second n-type transistor having a drain connected to an output contact point, the output contact point being connected to a gate of the first p-type transistor of the input-falling-transition circuit;
a second p-type transistor having a drain connected to the output contact point, the second p-type transistor having a gate connected to the input contact point of the input-falling-transition circuit; and
a third p-type transistor connected in series with the second p-type transistor, the third p-type transistor having a drain connected to a source of the second p-type transistor, the third p-type transistor having a source connected to the VDDH voltage of the high-voltage domain, the third p-type transistor having a gate connected to the single-rail input.
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Abstract
An apparatus includes a single-rail input connected to a low-voltage domain and a voltage-transition circuit connected to the single-rail input. The voltage-transition circuit is configured to convert a voltage of the low-voltage domain received via the single-rail input to a voltage of the high-voltage domain.
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Citations
6 Claims
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1. A voltage level shifter, comprising:
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a single-rail input connected to a low-voltage domain; and a voltage-transition circuit connected to the single-rail input, the voltage-transition circuit being configured to convert a voltage of the low-voltage domain received via the single-rail input to a voltage of a high-voltage domain; wherein the voltage-transition circuit includes an input-falling-transition circuit, the input-falling-transition circuit comprising; a first p-type transistor; and a first n-type transistor having a drain connected to a drain of the first p-type transistor at an input contact point, the first n-type transistor having a source connected to the single-rail input, the first n-type transistor having a gate connected to a reference voltage, the first p-type transistor having a source connected to a VDDH voltage of the high-voltage domain; wherein the voltage-transition circuit includes an input-rising-transition circuit, the input-rising-transition circuit comprising; a second n-type transistor having a gate connected to the single-rail input, the second n-type transistor having a source connected to a ground voltage, the second n-type transistor having a drain connected to an output contact point, the output contact point being connected to a gate of the first p-type transistor of the input-falling-transition circuit; a second p-type transistor having a drain connected to the output contact point, the second p-type transistor having a gate connected to the input contact point of the input-falling-transition circuit; and a third p-type transistor connected in series with the second p-type transistor, the third p-type transistor having a drain connected to a source of the second p-type transistor, the third p-type transistor having a source connected to the VDDH voltage of the high-voltage domain, the third p-type transistor having a gate connected to the single-rail input. - View Dependent Claims (2, 3, 4, 5, 6)
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Specification