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US 9,882,752 B2Granted
Method and apparatus for generating a multi-level pseudo-random test signal
AssigneeInternational Business Machines Corporation
InventorMarcel A. Kossel
Life of this patent
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Abstract
The present invention relates to a method for generating multi-level PRBS patterns for testing purposes, wherein the method includes the steps of providing a binary PRBS signal with a binary bit pattern sequence and mapping each bit of the binary bit pattern sequence to a symbol of a multilevel output.
Claims19
A method for generating multi-level pseudo-random bit sequence (PRBS) patterns, the method comprising the steps of:
- providing a binary PRBS signal with a binary bit pattern sequence;
- and
- mapping each bit of the binary bit pattern sequence to a symbol of a multilevel output;
- wherein one symbol of a list of symbols is sequentially output each time state machines are triggered by a bit tester, the bit tester providing a first trigger signal for triggering a first state machine and a second trigger signal for triggering a second state machine for each of one or more clock cycles,
- wherein the state machines subsequently provide positive and negative symbols according to the binary PRBS signal, with each of the binary PRBS signals being different, and
- wherein the multilevel output is synchronized to a clock signal and transmitted via a transmission channel.
3 more elements
An apparatus for generating multi-level pseudo-random bit sequence (PRBS) patterns for testing purposes, comprising:
- a PRBS generator for providing a binary PRBS signal with a binary bit pattern sequence;
- and
- a mapping unit for mapping each bit of the binary bit pattern sequence to a symbol of a multilevel output;
- wherein one symbol of a list of symbols is sequentially output each time state machines are triggered by a bit tester, the bit tester providing a first trigger signal for triggering a first state machine and a second trigger signal for triggering a second state machine for each of one or more clock cycles,
- wherein the state machines subsequently provide positive and negative symbols according to the binary PRBS signal, with each of the binary PRBS signals being different, and
- wherein the multilevel output is synchronized to a clock signal and transmitted via a transmission channel.
3 more elements
Dependencies are inferred from the claim text.