Transmitter Circuit Amplitude Modulation for Single-Line Clock Data Transmission
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Solution Overview
Problem
Existing data transmitting/receiving systems require multiple lines for clock and data transmission, leading to high current consumption and unstable high-speed operations, especially when using clock data recovery circuits with complex generators.
Innovation Solution
A transmitting/receiving system that transmits clock and data together through a single line by varying the clock amplitude based on the logic level of the data, using a transmitter circuit with multiple drivers to adjust clock amplitudes and a receiver circuit that recovers clock and data through amplitude detection, eliminating the need for clock data recovery circuits.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple lines are used for clock and data transmission, then transmission stability is improved, but current consumption increases and device complexity increases
Solution Approach 1:
The patent combines clock signal transmission and data transmission into a single transmission line. The transmitter modulates the clock signal amplitude according to data values, allowing both clock and data to be conveyed through one line rather than requiring separate lines, thereby reducing current consumption and device complexity while maintaining transmission stability
Solution Approach 2:
The single transmission line performs multiple functions: it carries both the clock signal and the data information. By making the transmission line universal for both purposes through amplitude modulation, the system eliminates the need for separate dedicated clock and data lines, reducing overall system complexity and power consumption
2Ease of operation
If clock data recovery circuit with generator is used, then data reception is achieved, but current consumption increases and operation stability deteriorates
Solution Approach 1:
The patent extracts and eliminates the complex clock data recovery circuit with generator from the receiver system. Instead of using a separate recovery circuit, the receiver directly detects the amplitude-modulated clock signal to recover both clock and data, simplifying the receiver structure and improving operation stability while maintaining data reception capability
Solution Approach 2:
The transmitter creates an amplitude-modulated copy of the clock signal that embeds data information. The receiver detects this modulated clock signal directly, eliminating the need for a separate clock generator and recovery circuit, thereby simplifying the system and improving stability
3Productivity
If multiple transmission lines are used, then transmission capability is improved, but device complexity increases
Solution Approach 1:
The patent merges clock signal transmission and data transmission into a single transmission line by using amplitude modulation. The transmitter varies the clock signal amplitude according to data values, allowing one line to carry both clock and data information, thereby reducing the number of required lines and device complexity while maintaining full transmission capability
Solution Approach 2:
The patent changes the amplitude parameter of the clock signal to encode data information. By modulating the clock signal amplitude according to data values and detecting these amplitude variations at the receiver, the system achieves efficient data transmission through a single line, reducing device complexity without sacrificing transmission capability
Data Source
AI summary
A transmitting/receiving system may include a transmission line, a transmitter circuit configured to transmit a clock to the transmission line and to adjust an amplitude of the clock in accordance with a logic level of data, and a receiver circuit configured to receive the clock transferred to the transmission line and to recover the data through detection of the amplitude of the clock.