Trans-Impedance Amplifier Shaping Filter With Lower Power
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current trans-impedance amplifiers (TIAs) face performance tradeoffs between power consumption and filtering capability, with first-order active structures consuming less power but having lower filtering capabilities, and second-order active structures having stronger out-of-band interference suppression but higher power consumption.
Innovation Solution
A TIA design incorporating a single operational amplifier, three circuits with passive components, and a third circuit that cooperates with the first and second circuits to perform shaping filtering, reducing power consumption while enhancing filtering performance and out-of-band interference suppression.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If a first-order active structure TIA is used, then power consumption is reduced, but filtering capability deteriorates
Solution Approach 1:
The patent combines first-order and second-order active structures into a unified TIA architecture that integrates the low-power advantage of first-order structures with the strong filtering capability of second-order structures, achieving both power efficiency and superior filtering performance simultaneously
Solution Approach 2:
The patent employs a composite structure that integrates both first-order and second-order active elements within a single TIA design, creating a hybrid architecture that leverages the strengths of both approaches to resolve the contradiction between power consumption and filtering capability
2Reliability
If a second-order active structure TIA is used, then filtering capability is improved, but power consumption increases
Solution Approach 1:
The patent segments the TIA into distinct first-order and second-order active structure modules, allowing each segment to perform specific functions optimized for its design characteristics while working together to achieve overall system performance that balances power consumption and filtering capability
Solution Approach 2:
The patent merges first-order and second-order active structures into a unified TIA architecture that integrates the low-power advantage of first-order structures with the strong filtering capability of second-order structures, achieving both power efficiency and superior filtering performance simultaneously
Data Source
AI summary
A trans-impedance amplifier (TIA) includes a first circuit, a second circuit, and a third circuit. Both the first circuit and the second circuit are coupled to a current source, an operational amplifier, and the third circuit. The first circuit is configured to receive a first current, provide a third voltage to the third circuit, perform shape filtering on the first current, and convert the shape filtered first current to a first voltage for output. The second circuit is configured to receive a second current, provide a fourth voltage to the third circuit, perform shape filtering on the second current, and convert the shape filtered second current to a second voltage for output. The third circuit is configured to cooperate with the first circuit and the second circuit in performing shape filtering. The operational amplifier is configured to provide a small-signal virtual ground point to the first circuit.