Integrated Front-End PCB for Low-Noise Particle Sensor Timing
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Solution Overview
Problem
Current timing detectors in high-energy physics and other applications face challenges with complex setups, noise addition, potential damage from cables, and increased testing time due to the need for multiple boards with sensors, amplifiers, and discriminators, which complicates the analysis of current signals from detectors.
Innovation Solution
A multipurpose front-end printed circuit board (PCB) is designed with a sensor pad, a multi-stage amplifier, and a discriminator integrated on a single board, allowing for efficient signal conversion and characterization, reducing noise and complexity by housing all necessary components in a compact, 6-layer PCB.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If multiple separate boards are used for sensors, amplifiers, and discriminators, then each component can be optimized independently, but the device complexity and setup complexity increase significantly
Solution Approach 1:
The patent integrates the sensor pad, multi-stage amplifier, and discriminator onto a single front-end board. This consolidation eliminates the need for multiple separate boards and external cabling, directly reducing setup complexity while maintaining signal integrity and characterization precision through optimized internal connections.
Solution Approach 2:
The front-end board is designed as a universal platform that can characterize different types of solid-state sensors (silicon, diamond, ceramic) through a standardized sensor pad interface. The integrated amplifier and discriminator provide multi-functional signal processing capabilities, allowing the same board to serve multiple characterization purposes.
2Adaptability or versatility
If multiple boards with cables are used to connect sensors, amplifiers, and discriminators, then component flexibility is maintained, but noise is added and potential damage from cables occurs
Solution Approach 1:
By integrating all signal processing components (amplifier, discriminator) directly on the same board as the sensor pad, the invention eliminates external cables and connectors. This removes the sources of electromagnetic noise and potential cable-related damage, while the internal PCB traces provide controlled-impedance signal paths that maintain signal integrity.
Solution Approach 2:
The front-end board acts as an intermediary platform that provides standardized interfaces for sensor connection while protecting the sensitive amplifier and discriminator circuits. The board's ground plane and shielding structures serve as mediators to reject external noise, and the integrated design eliminates cable-related damage risks entirely.
3Measurement precision
If multiple separate boards are used for testing, then each board can be specialized, but the testing time increases due to complex setup and analysis
Solution Approach 1:
The integration of sensor pad, amplifier, and discriminator on a single board creates a ready-to-use characterization platform. Users simply mount the sensor on the pad and connect power, eliminating the time-consuming process of assembling and configuring multiple separate boards. The unified design reduces setup time while maintaining characterization precision through optimized signal paths.
Solution Approach 2:
The front-end board incorporates adjustable parameters through potentiometers that allow users to optimize the discriminator threshold voltage and amplifier gain for different sensor types and applications. This parameter adjustability maintains characterization precision across various sensor technologies while reducing the need for multiple specialized boards, thereby decreasing testing time.
4Device complexity
If a compact integrated board is used, then device complexity and noise are reduced, but manufacturing precision requirements increase
Solution Approach 1:
The integration of multiple components on a single board does increase manufacturing precision requirements, particularly for PCB trace impedance control and component placement. However, the patent addresses this through careful PCB design with designated ground planes, controlled-impedance traces, and standardized component footprints that facilitate precise manufacturing while maintaining low complexity and low noise.
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 solution achieves improved time precision of around 14 ps, low noise, and high-speed functionality, with reduced power consumption and noise interference, enabling effective characterization of solid-state sensors like UFSD and diamond sensors, while simplifying the testing process and reducing equipment complexity.
Implementation Method 1
a first stage amplifier circuit configured to receive the current signal and convert the current signal to a voltage signal
Implementation Method 2
a second stage amplifier circuit configured to receive the voltage signal from the first stage amplifier circuit and produce an amplified voltage signal
Implementation Method 3
a third stage amplifier circuit configured to receive the amplified voltage signal from the second stage amplifier, the third stage amplifier circuit being configured to invert the amplified voltage signal and produce an output voltage signal
Implementation Method 4
The discriminator configured to receive the output voltage signal and generate characterization data based on a comparison between the output voltage signal and a voltage threshold
Data Source
AI summary
A multipurpose front-end board for solid state sensors is described. In particular, the board is optimized for fast timing particle detection or for characterization and test of silicon and diamond detectors that produce a fast but small current signal at the passage of a particle. The multipurpose front-end board includes a sensor pad configured to receive a solid state sensor to be characterized, distribute a bias potential, and read out the current signal produced by the sensor. The board also includes an amplifier configured to read out the current signal from the sensor pad and convert the current signal to an output voltage signal and a discriminator configured to receive the output voltage signal from the amplifier. A threshold voltage of the discriminator can be controlled by a potentiometer, and the board includes at least one output port to provide data for characterization of the sensor.