Digital sensor arrays based on ring oscillators are used to monitor the temperature of Field Programmable Gate Array (FPGA) chips, but traditional sensor structures using binary frequency counters consume excessive hardware logic resources. This paper proposed a compact temperature sensor array that used low-decoding-complexity linear feedback shift registers (LFSR) as a frequency counter to efficiently count the ring oscillator frequency. We implemented an experimental system on a Spartan-6 FPGA, and the logic resource consumption of the entire system was 927 Look-Up-Tables (LUTs) with an overhead of only 10%. The single sampling time was approximately 40 μs. The proposed temperature sensor array has good temperature sensing capabilities, and the measured error is $\pm$0.9$°C$(3$\text{σ}$).

基于环形振荡器的数字传感器阵列用于监视现场可编程门阵列（FPGA）芯片的温度，但是使用二进制频率计数器的传统传感器结构会消耗过多的硬件逻辑资源。本文提出了一种紧凑的温度传感器阵列，该阵列使用低解码复杂度线性反馈移位寄存器（LFSR）作为频率计数器来有效地计算环形振荡器的频率。我们在Spartan-6 FPGA上实现了一个实验系统，整个系统的逻辑资源消耗为927个查找表（LUT），开销仅为10％。单次采样时间约为40μs。所提出的温度传感器阵列具有良好的温度感应能力，并且测得的误差为$\pm$0.9$摄氏$（3$\text{σ}$）。