Pulse shaping apparatus and method
AssigneeAdtran, Inc.
InventorsDaniel M. Joffe, Paul C. Ferguson
Life of this patent
Estimating the term…
Abstract
A system has a first digital-to-analog (D/A) converter to receive a digital signal and to convert the digital signal into an analog pulse, a second D/A converter to cancel residual energy resulting from a previous pulse if a predetermined sequence of digital data is received, and a third D/A converter to control a falling edge of the analog pulse. Additionally, the system has logic to detect the sequence of digital data and to generate control data for at least one of the D/A converters from the digital data sequence thereby ensuring that the analog signal complies with the specified pulse mask template.
Claims18
A system for ensuring compliance with a specified pulse mask template, comprising:
- a first digital-to-analog (D/A) converter configured to receive a digital signal and to convert the digital signal into an analog pulse;
- a second D/A converter configured to cancel residual energy resulting from a previous pulse if a predetermined sequence of digital data is received;
- a third D/A converter configured to control a falling edge of the analog pulse;
- and
- logic configured to detect the sequence of digital data and to generate control data for at least one of the D/A converters from the digital data sequence thereby ensuring that the analog signal complies with the specified pulse mask template.
A method for ensuring compliance with a specified pulse mask template, comprising the steps of:
- receiving a digital signal;
- converting the received digital signal into an analog signal, if the analog signal comprises an isolated pulse defined by a particular sequence of digital data in the digital signal, the isolated pulse having a main body portion and a leading edge portion;
- detecting the particular sequence of digital data;
- generating the main body portion in response to the particular sequence of digital data;
- generating the leading edge portion in response to the particular sequence of digital data separate from the step of generating the main body portion;
- and
- sequentially combining the main body and the leading edge portions.
A transceiver, comprising:
- an input interface configured to receive a value indicative of an amplitude of a predefined pulse;
- and
- logic configured to sequentially combine the predefined pulse with an isolated pulse in response to a digital input sequence representative of the isolated pulse, the amplitude of the predefined pulse based on the value such that the isolated pulse complies with a specified pulse mask template.
A system, comprising:
- a pulse generator configured to receive a sequence of digital data and to generate a compliant isolated pulse based on the sequence of digital data, the pulse generator having first, second and third digital-to-analog converters, the first digital-to-analog converter configured to define a main body portion of the isolated pulse, the second digital-to-analog converter configured to define a leading edge portion of the isolated pulse, and the third digital-to-analog converter configured to define a falling edge portion of the isolated pulse;
- and
- a filter configured to filter the isolated pulse.
Dependencies are inferred from the claim text.