Complementary-Boost Transmitter Circuit for Noisy Capacitive Loads
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Systems with transmitter circuits that drive output pins with large capacitive loads typically consume substantial power and are affected by supply and ground noise, as well as series resistance in chip-to-chip interconnects.
Innovation Solution
A transmitter circuit design that drives an output pin with a data signal and boosts the output pin's potential using a complementary signal during each transition, utilizing a combination of transistors and capacitors to manage voltage and reduce noise effects, allowing the circuit to drive large capacitive loads with low power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If a transmitter circuit drives output pins with large capacitive loads using conventional methods, then the capacitive load is driven, but power consumption becomes substantial
Solution Approach 1:
The patent applies periodic action by using complementary boosting signals that are activated during specific transitions (rising or falling edges) of the data signal. The circuit selectively boosts only during needed transitions rather than continuously, reducing power consumption while maintaining the ability to drive large capacitive loads effectively.
Solution Approach 2:
The patent changes the voltage parameter dynamically by introducing boosting signals that temporarily increase the voltage swing during transitions. The complementary boosting signals (first boosting signal and second boosting signal) modify the voltage parameters of the output pin only when needed, allowing the circuit to drive large capacitive loads with reduced steady-state power consumption.
2Object-affected harmful factors
If conventional transmitter circuits drive large capacitive loads, then the capacitive load is driven, but supply and ground noise significantly affects performance
Solution Approach 1:
The patent converts the harmful effect of large capacitive loads into a benefit by using the same capacitive structure to store and release energy during transitions. The complementary boosting signals utilize the capacitive load to their advantage, charging and discharging in a controlled manner that reduces noise interference while maintaining driving capability.
Solution Approach 2:
The patent introduces complementary boosting signals as intermediaries between the data signal and the capacitive load. These boosting signals act as mediators that isolate the circuit from supply and ground noise by providing controlled voltage transitions, thereby reducing noise interference while driving the capacitive load.
3Reliability
If conventional transmitter circuits drive large capacitive loads, then the capacitive load is driven, but series resistance in chip-to-chip interconnects degrades performance
Solution Approach 1:
The patent applies preliminary action by pre-charging or pre-discharging the capacitive load using complementary boosting signals before the actual data transition occurs. This preliminary action ensures that the voltage transitions are cleaner and more controlled, compensating for the voltage drop caused by series resistance in chip-to-chip interconnects and maintaining signal integrity.
4Device complexity
If differential signals are translated to single-ended signals for external transmission, then the number of external pins is reduced, but noise susceptibility increases
Solution Approach 1:
The patent changes the voltage parameters of the single-ended signal by introducing complementary boosting signals that enhance the voltage swing during transitions. This parameter change compensates for the loss of differential signaling's noise rejection capability, allowing single-ended transmission with reduced noise susceptibility while maintaining fewer external pins.
Data Source
AI summary
Apparatus, systems, and methods are disclosed that operate to drive an output with a data signal and to boost a potential of the output in response to a boost signal. Additional apparatus, systems, and methods are disclosed.