High speed level translator
First Claim
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1. A level translator, comprising:
- a resistor divider; and
a one-shot circuit which includes a pull-up stack of transistors in parallel with the resistor divider, and which the one-shot circuit conducts to assist during a transition from a first state to a second state through a conduction path provided by the transistors of the pull-up stack, and is non-conducting during a transition from the second state to the first state,wherein the resistor divider is switched on/off to provide an output at two different levels of VPP2 and VPP, where VPP2 is a low voltage for an inverter chain and VPP is the low voltage inverted to a high voltage,wherein the one-shot circuit translates from the low voltage to the high voltage using the transistors arranged in parallel with a first resistor of the resistor divider, andwherein the one-shot circuit is comprised of an inverter chain having outputs controlling gates of the transistors which are arranged in series, with one another, to provide a conduction path between an output level of the first resistor of the resistor divider.
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Abstract
A high speed VPP level translator circuit using thin-oxide field effect transistors (FETs) and methods of use are disclosed. The level translator includes a resistor divider and a one-shot circuit in parallel with the resistor divider. The one-shot circuit conducts to assist a transition from a first state to a second state, and is non-conducting during the transition from the second state to the first state.
20 Citations
17 Claims
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1. A level translator, comprising:
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a resistor divider; and a one-shot circuit which includes a pull-up stack of transistors in parallel with the resistor divider, and which the one-shot circuit conducts to assist during a transition from a first state to a second state through a conduction path provided by the transistors of the pull-up stack, and is non-conducting during a transition from the second state to the first state, wherein the resistor divider is switched on/off to provide an output at two different levels of VPP2 and VPP, where VPP2 is a low voltage for an inverter chain and VPP is the low voltage inverted to a high voltage, wherein the one-shot circuit translates from the low voltage to the high voltage using the transistors arranged in parallel with a first resistor of the resistor divider, and wherein the one-shot circuit is comprised of an inverter chain having outputs controlling gates of the transistors which are arranged in series, with one another, to provide a conduction path between an output level of the first resistor of the resistor divider. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A level translator, comprising:
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a resistor divider comprising a first resistor and a second resistor, in series; and a one-shot circuit comprising a first transistor and a second transistor which comprise a pull-up stack, in series, the pull-up stack in parallel with the resistor divider, and an inverter chain providing control to the first transistor and the second transistor. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16)
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17. A method comprising:
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controlling transistors of a pull-up stack of a one-shot circuit such that the pull-up stack conducts to assist a transition from a first state to a second state, and is non-conducting during the transition from the second state to the first state, wherein the transistors are controlled through an inverter chain; and controlling a resistor divider, wherein the resistor divider is switched on/off to provide an output at two different levels VPP2 and VPP, wherein the one-shot circuit translates from a low voltage to high voltage domain using transistors arranged in parallel with a first resistor of the resistor divider, and wherein the one-shot circuit is comprised of an inverter chain having outputs controlling gates of the transistors which are arranged in series, with one another, to provide a conduction path between an output level of the first resistor of the resistor divider.
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Specification