AC/DC Peak Detector Circuit for Signal Type Discrimination
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Solution Overview
Problem
Existing signal detection and discrimination systems are complex, leading to high setup, maintenance, and design costs, as they require separate circuits to differentiate between AC and DC signals or currents, which complicates their design and operation.
Innovation Solution
A single device or circuit is configured to detect and differentiate between AC signals and both positive and negative DC signals using a differential receiver and Schmitt triggers, allowing for monitoring and evaluation of incoming signals on both sides of the waveform, thereby simplifying the detection process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If separate circuits are used to detect AC and DC signals, then detection reliability is improved, but device complexity increases
Solution Approach 1:
The patent combines multiple detection functions into a single integrated circuit that can detect both AC and DC signals simultaneously. The circuit uses a single operational amplifier configured with diodes and capacitors to create peak detection paths for both signal types, eliminating the need for separate AC and DC detection circuits while maintaining reliable detection of each signal type.
Solution Approach 2:
The detection circuit is designed as a universal device that handles multiple signal types (AC and DC) and multiple polarities (positive and negative) through a single integrated structure. The operational amplifier-based circuit with symmetric peak detection paths can universally detect any current input signal regardless of its type or polarity, making the device multi-functional without requiring separate specialized circuits.
2Measurement precision
If multiple separate detection devices are used for AC and DC signals, then measurement precision is improved, but ease of manufacture deteriorates
Solution Approach 1:
The patent merges multiple detection functions into a single integrated circuit that can detect both AC and DC signals simultaneously. The circuit uses a single operational amplifier configured with diodes and capacitors to create peak detection paths for both signal types, eliminating the need for separate AC and DC detection circuits while maintaining reliable detection of each signal type.
3Device complexity
If a single device detects both AC and DC signals, then device complexity is reduced, but measurement precision may deteriorate
Solution Approach 1:
The single detection circuit is segmented into separate detection paths within the integrated circuit. The operational amplifier circuit includes distinct peak detection paths with diodes and capacitors that separately process positive and negative signal peaks, allowing accurate differentiation of AC and DC signals while maintaining low device complexity through the unified integrated structure.
Data Source
AI summary
A device and method for current detecting and discriminating is disclosed. The device includes a differential receiver configured to receive a current input, a positive-side Schmitt trigger in communication with the input stage, wherein the positive-side Schmitt trigger is configured to receive an output provided by the input stage, and wherein the positive-side Schmitt trigger is configured to create a positive-side Schmitt trigger output representative of the current input, and a negative-side Schmitt trigger in communication with the input stage, wherein the negative-side Schmitt trigger is configured to receive the output provided by the input stage, and wherein the negative-side Schmitt trigger is configured to create a negative-side Schmitt trigger output representative of the current input.