Signal Amplifier Circuit for Multi-Range Common-Mode Reception
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Interface circuits face limitations in signal reception due to varying signal magnitudes from different transmitters, restricting the compatibility with diverse devices and requiring separate bias voltage generation, which increases size and power consumption.
Innovation Solution
A signal amplifier and receiving circuit that utilize a combination of folded-cascode and common source amplifiers, along with a switching mechanism and negative feedback, to adjust common mode voltages and optimize power usage, allowing operation across different voltage ranges without separate bias voltage generation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If separate bias voltage generation circuits are used for different voltage ranges, then signal reception compatibility is improved, but device size and power consumption increase
Solution Approach 1:
The patent merges the bias voltage generation functionality into the existing amplifier circuit by utilizing the power supply voltage directly as the bias voltage source. This eliminates the need for separate bias voltage generation circuits, thereby reducing device size and power consumption while maintaining the ability to handle signals across different voltage ranges through the amplifier's inherent voltage range adaptation capability.
2Adaptability or versatility
If multiple amplifiers for different voltage ranges are used, then signal reception compatibility is improved, but device size increases
Solution Approach 1:
The patent designs a universal amplifier circuit that can handle signals across multiple voltage ranges (first voltage range and second voltage range) using a single amplifier structure. The amplifier is configured to receive input signals with common mode voltages in either voltage range and output amplified signals with common mode voltages in the second voltage range, eliminating the need for multiple dedicated amplifiers and thereby reducing device size.
3Area of stationary object
If a single amplifier is used for all voltage ranges, then device size is reduced, but signal reception compatibility deteriorates
Solution Approach 1:
The patent implements dynamic voltage range adaptation within the amplifier circuit. The amplifier is configured to adaptively handle input signals with common mode voltages in different voltage ranges by maintaining proper signal levels through its circuit design, allowing a single amplifier to dynamically process signals from various voltage ranges without requiring external voltage conversion circuits.
Data Source
AI summary
A signal amplifier includes a first amplifier, a second amplifier, and an output. The first amplifier amplifies a first input signal to form a first amplified output signal. The first input signal has a common mode voltage in a first voltage range, and the first amplified output signal has a common mode voltage in a second voltage range different from the first voltage range. The second amplifier amplifies a second input signal to form a second amplified output signal. The first input signal has the common mode voltage in the second voltage range and the second amplified output signal has the common mode voltage in the second voltage range. The output outputs the first amplified output signal or the second amplified output signal as an amplified output signal.