Peak Comparator Feedback Circuit for Low-Voltage Fast Detection
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Solution Overview
Problem
Conventional peak comparator circuits face challenges in achieving high accuracy and speed while operating with low current consumption and low supply voltage, particularly in modern electronic circuitries that require compatibility with voltages as low as 1.8 V, and introduce signal delays due to current peak detectors.
Innovation Solution
The proposed peak comparator circuitry uses a differential amplifier and comparator circuit with a feedback path, replacing the current peak detector to enable operation at lower voltages and current consumption, utilizing an operational transconductance amplifier and a latching feedback circuit to provide immediate output validity when the input signal exceeds the reference level.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If a conventional current peak detector is used in the peak comparator circuitry, then the circuit can detect peak voltages, but it introduces signal delay and cannot be operated in low supply voltage domains
Solution Approach 1:
The patent extracts and removes the current peak detector component from the conventional peak comparator circuitry. By taking out this problematic component, the circuit eliminates signal delay issues and gains the ability to operate in low supply voltage domains (e.g., 1.8V), while still maintaining peak detection functionality through alternative circuit architecture
Solution Approach 2:
The patent substitutes the conventional current-mode peak detection mechanism with a voltage-mode comparison approach using a differential amplifier and comparator circuit. This substitution replaces the mechanical/current-based detection system with an electrical/voltage-based system that is faster and compatible with low voltage operation
2Measurement precision
If the peak comparator circuitry is designed for high accuracy and speed, then detection performance improves, but current consumption increases
Solution Approach 1:
The patent changes key circuit parameters including using a differential amplifier with optimized gain, selecting appropriate comparator threshold levels, and configuring feedback path parameters. These parameter changes enable the circuit to achieve high detection accuracy and speed while consuming lower current compared to conventional designs
3Measurement precision
If the peak comparator circuitry is designed for high accuracy and speed, then detection performance improves, but supply voltage requirements increase
Solution Approach 1:
The patent removes components and circuit elements that require high supply voltages to operate. By extracting these high-voltage-dependent components, the circuit can achieve high detection accuracy and speed while operating from low supply voltages (e.g., 1.8V), making it compatible with modern low-voltage electronic systems
Data Source
AI summary
The peak comparator circuitry comprises a differential amplifier circuit having an output node to generate a differential amplifier output signal in response to an amplification of a difference of an input signal and a reference signal, and a comparator circuit having an output node to generate a comparator output signal. A feedback path of the peak comparator circuitry is arranged between the output node of the comparator circuit and the output node of the differential amplifier circuit. The proposed peak comparator circuitry allows for a low voltage supply, a low current consumption and a fast output validity.