SerDes Transmitter Dummy Pulses for Jitter Reduction
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Solution Overview
Problem
Conventional approaches for handling jitter in serializer-deserializer (SerDes) transmitters are costly, cumbersome, and inefficient, often introducing errors or distortion, and require considerable power.
Innovation Solution
The implementation of dummy current pulses and adaptive dummy data generation to minimize data-dependent supply variations, thereby reducing jitter in SerDes transmitters by ensuring constant current supply and independent supply modulation from data patterns.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional approaches are used to handle jitter in SerDes transmitters, then jitter can be managed, but the system becomes complex, power-consuming, and introduces errors or distortion
Solution Approach 1:
The patent extracts the problematic data-dependent supply variations from the system by introducing dummy current pulses that are independent of the actual data pattern. This separates the jitter-causing supply noise from the data signal, allowing the data to be transmitted without being modulated by power supply variations.
Solution Approach 2:
The patent introduces dummy current pulses as an intermediary element that mediates between the power supply and the data transmission. These dummy pulses serve as a buffer that absorbs supply variations without affecting the actual data signal, thereby reducing jitter while maintaining transmission integrity.
2Reliability
If conventional approaches are used to handle jitter in SerDes transmitters, then jitter can be managed, but considerable power is required
Solution Approach 1:
The patent applies partial action by using dummy current pulses only when necessary to compensate for supply variations, rather than continuously monitoring and correcting all jitter sources. This selective approach reduces power consumption while still achieving effective jitter reduction.
3Reliability
If conventional approaches are used to handle jitter in SerDes transmitters, then jitter can be managed, but errors or distortion are introduced
Solution Approach 1:
The patent extracts the harmful data-dependent supply variations from the transmission path by using dummy current pulses. This separation ensures that the actual data signal is not contaminated by supply noise, preventing errors and distortion while maintaining data integrity.
4Reliability
If dummy current pulses are used to minimize data-dependent supply variations, then jitter is reduced, but additional circuitry is required
Solution Approach 1:
The patent merges the dummy current pulse generation function with the existing power supply circuitry in the SerDes transmitter. By integrating the jitter reduction mechanism into the existing power distribution network, the patent minimizes additional circuitry while achieving effective jitter reduction.
5Reliability
If adaptive dummy data generation is implemented, then supply variations are minimized and jitter is reduced, but processing complexity increases
Solution Approach 1:
The patent implements self-service by having the system automatically generate adaptive dummy data based on detected supply variations. The SerDes transmitter monitors its own power supply conditions and autonomously adjusts the dummy current pulses accordingly, eliminating the need for external control systems and reducing processing complexity.
Data Source
AI summary
Systems and methods are provided for handling jitter improvement in transmitters. During processing of input data for serial transmission, it may be determined if jitter may occur, and when jitter occurs one or more adjustments may be determined, based on dummy data, to reduce jitter in an output corresponding to the input data. The one or more adjustments may then be applied during processing of the input data, to reduce jitter in a serial output corresponding to the input data. The dummy data may be generated based on the input data. The dummy data may be configured such that it may generate corresponding dummy current pulses which may be used in controlling supply variations during generation of the serial output. The use of the dummy data may be selectively turned on or off.