Output Circuit Peak Voltage Detection
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Solution Overview
Problem
Existing peak detection circuits for output signals struggle to accurately detect peak voltages, especially in differential signals, due to limitations in frequency response and signal division.
Innovation Solution
The proposed output circuit includes an inductor, an amplifier circuit, a voltage divider circuit with capacitive elements, band-adjusting elements with resistance components, and a peak detection circuit. This configuration generates a band-adjusted signal that allows for accurate peak voltage detection in both normal and reverse phase components of a differential output signal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If capacitors are connected in series to divide the output signal voltage for peak detection, then the peak voltage can be detected, but the frequency response becomes limited and detection accuracy deteriorates
Solution Approach 1:
The voltage division function is segmented into multiple stages: the first voltage divider (C1, C2) provides initial voltage division, and the second voltage divider (C3, C4) provides additional division. This multi-stage segmentation allows each stage to operate within its optimal frequency range, collectively achieving both wide frequency response and accurate peak detection across the extended bandwidth.
Solution Approach 2:
The patent extends the detection capability from a single frequency point to a wide frequency range by introducing frequency-selective paths. The band-adjusting elements create multiple detection channels with different frequency responses, allowing the circuit to detect peak voltages across a broad spectrum by combining information from multiple frequency dimensions.
2Device complexity
If the output signal is directly monitored for peak detection, then the detection circuit is simple, but the frequency response is limited and cannot accurately detect peak voltages across wide bandwidth
Solution Approach 1:
The detection circuit achieves multi-functionality by incorporating parallel detection paths with different frequency characteristics. The first peak detection circuit detects peak voltages in a first frequency range, while the second peak detection circuit detects peak voltages in a second frequency range. This universal design allows a single detection system to handle multiple frequency bands simultaneously, maintaining accuracy across wide bandwidth without requiring completely separate detection systems for each frequency range.
3Adaptability or versatility
If band-adjusting elements are added to extend frequency response, then frequency adaptability improves, but circuit complexity increases
Solution Approach 1:
The patent merges the voltage division function and frequency adjustment function into a unified circuit structure. The same capacitors (C1-C4) used for voltage division also work in conjunction with the band-adjusting elements (R1-R4) to provide frequency-selective detection. This merging eliminates the need for separate voltage division and frequency adjustment circuits, achieving wide frequency response while controlling overall circuit complexity through functional integration.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The output circuit effectively detects peak voltages in differential output signals, improving the accuracy and reliability of peak detection across a wide frequency range, thereby enhancing the performance of driver circuits for optical modulators.
Implementation Method 1
a voltage divider circuit that divides a voltage of the output signal to generate a voltage-divided signal
Implementation Method 2
a band-adjusting element that adjusts frequency characteristics of the voltage-divided signal to generate a band-adjusted signal
Implementation Method 3
a peak detection circuit that detects a peak voltage of the band-adjusted signal
Data Source
AI summary
An output circuit includes: an inductor, an amplifier circuit that outputs an output signal via the inductor, an output terminal that outputs the output signal to an outside, a voltage divider circuit including a series circuit constituted by a first capacitive element and a second capacitive element connected in series to the first capacitive element, the series circuit generating a first voltage-divided signal by dividing a voltage of the output signal, a first band-adjusting element having a resistance component for generating a first band-adjusted signal by adjusting frequency characteristics of the first voltage-divided signal, and a first peak detection circuit that detects a peak voltage of the first band-adjusted signal and output a first peak voltage in accordance with the detected peak voltage.