Bidirectional Data Transceiver Circuit for Superimposed Signal Separation
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Solution Overview
Problem
Existing semiconductor chips face challenges in efficiently removing outbound signals from superimposed inbound signals while improving pin efficiency, data rate, and reducing power consumption during bidirectional signaling.
Innovation Solution
A semiconductor chip design incorporating a voltage mode driver with pull-up and pull-down resistor circuits, a current source circuit, and a hybrid resistor, along with a calibration circuit to adjust resistance values and current sources, enables effective signal separation and improved data transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If simultaneous bidirectional signaling (SBD) is used to improve pin efficiency and data rate, then the outbound signal is superimposed on the inbound signal on the transmission line, making it necessary to remove the outbound signal from the superimposed signal at the receiving end
Solution Approach 1:
The patent extracts and removes the outbound signal from the superimposed signal at the receiving end through signal processing circuits. This allows the receiver to separate and eliminate the transmitted outbound signal to correctly receive the inbound signal from the other party, resolving the interference problem while maintaining SBD operation
Solution Approach 2:
The patent introduces intermediary signal processing circuits that act as mediators between the superimposed signals. These circuits process the combined signal to separate and remove the outbound component, enabling clean reception of the inbound signal without requiring separate transmission lines
2Productivity
If signal separation circuits are added to remove outbound signals from superimposed signals, then pin efficiency and data rate can be improved, but power consumption of the chip increases
Solution Approach 1:
The patent optimizes the operating parameters of the signal processing circuits, including voltage levels, current consumption, and switching frequencies, to minimize power consumption while maintaining effective signal separation. This allows the system to achieve pin efficiency improvements without excessive power overhead
3Reliability
If traditional signal separation methods are used to remove outbound signals, then signal reception can be achieved, but pin efficiency and data rate are not optimized
Solution Approach 1:
The patent designs the signal processing circuits to perform multiple functions: signal separation, outbound signal removal, and reception processing, all within the same circuit architecture. This multi-functional approach achieves reliable signal reception while optimizing pin efficiency by handling bidirectional communication through integrated circuits rather than separate dedicated lines
Data Source
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AI summary
A device for transmitting first data to an external device and receiving second data from the external device is provided. The device includes: a voltage mode driver connected to a first node, the voltage mode driver including a pull-up resistor circuit and a pull-down resistor circuit, the pull-up resistor circuit including a plurality of pull-up resistors, and the pull-down resistor circuit including a plurality of pull-down resistors; a current source circuit connected to a second node and including a first current source and a second current source; a pre-driver configured to control the voltage mode driver and the current source circuit, based on the first data; a receiver connected to the second node and configured to obtain the second data based on a voltage level of the second node; and a hybrid resistor connected between the first node and the second node.