Combined OTA Filter-Integrator Circuit for Higher Signal Bandwidth
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing operational transconductance amplifiers (OTAs) have limitations in bandwidth when used in multiple configurations, which restrict the maximum allowable bandwidth of input signals in certain applications.
Innovation Solution
A single operational transconductance amplifier (OTA) is combined with a passive circuit to function as both a high-pass filter and integrator, maximizing bandwidth by eliminating the need for multiple OTAs and incorporating a passive circuit that receives an input signal and provides an output current, thereby enhancing the OTA's filtering capabilities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple OTAs are used to implement high-pass filter and integrator functions, then filtering and integration capabilities are achieved, but bandwidth is limited due to the need for multiple amplifier stages
Solution Approach 1:
The patent combines multiple OTA functions (high-pass filter and integrator) into a single unified circuit architecture. The passive circuit is coupled to a single OTA such that the passive circuit and OTA together perform high-pass filtering and integration of the input signal to provide the output current, eliminating the need for multiple separate OTA stages and thereby maximizing bandwidth
Solution Approach 2:
The single OTA is designed to perform multiple functions simultaneously - acting as both a high-pass filter and an integrator through its coupling with the passive circuit. This multi-functionality allows the circuit to achieve the capabilities previously requiring multiple specialized OTA stages, thus resolving the bandwidth limitation while maintaining versatility
2Speed
If a single OTA is used to maximize bandwidth, then bandwidth is improved, but the complexity of designing a circuit that performs both filtering and integration increases
Solution Approach 1:
The patent merges the filtering and integration functions into a single unified circuit using one OTA and a passive circuit. This consolidation reduces the total number of active components and simplifies the overall circuit architecture compared to using multiple separate OTA stages, thereby managing design complexity while achieving high bandwidth performance
3Adaptability or versatility
If multiple OTAs are used to achieve filtering and integration, then functional capabilities are maintained, but the number of components and circuit complexity increase
Solution Approach 1:
The patent merges multiple OTA functions into a single unified circuit architecture. The passive circuit is coupled to a single OTA such that they together perform high-pass filtering and integration, reducing the component count from multiple OTAs to just one OTA plus passive elements, thereby simplifying the circuit while maintaining full functional capabilities
Solution Approach 2:
The single OTA is designed to perform multiple functions simultaneously - acting as both a high-pass filter and an integrator through its coupling with the passive circuit. This multi-functionality allows the circuit to achieve the capabilities previously requiring multiple specialized OTA stages, thus reducing component count while maintaining versatility
Data Source
AI summary
Embodiments of circuitry, which includes an operational transconductance amplifier and a passive circuit, are disclosed. The passive circuit is coupled to the operational transconductance amplifier. Further, the passive circuit receives an input signal and the operational transconductance amplifier provides an output current, such that the passive circuit and the OTA high-pass filter and integrate the input signal to provide the output signal.