一种应用于反熔丝FPGA的电荷泵电路  

A Charge Pump circuit for Anti-Fuse FPGA

作　　者：刘明昭 曹振吉 LIU Ming-zhao;CAO Zhen-ji(Southeast University;No.58 Research Institute,China Electronics Technology Corporation)

机构地区：[1]东南大学 [2]中国电子科技集团公司第58研究所

出　　处：《中国集成电路》2023年第3期49-54,共6页China lntegrated Circuit

摘　　要：电荷泵(Charge Pump)电路以其可成倍输出自身输入电压的特性而被广泛应用于各种芯片的驱动电路中。在反熔丝FPGA中,反熔丝为高压一次编程器件,在编程过程中需要通过高压隔离管将反熔丝与其它器件隔离开,而高压隔离管在工作时需要大于芯片电源VCCA的电压来驱动,如何提供高压保证隔离管能够无损传输数据是反熔丝FPGA研发时必须要考虑的问题。本文提出了一种应用于反熔丝FPGA的电荷泵电路,电路具有快速启动的特点,同时电路工作频率可调,通过在电路中增加冗余NMOS结构,提高了电路在工作中的安全性,该电路在工作时能保证熔丝编程过程中除了反熔丝以外的其他器件不受编程电压的影响,且在编程结束后通过电荷泵输出电压打开隔离管完成信号的无损传输,能够满足反熔丝FPGA对于电荷泵的需求。Charge pump circuits are widely used in various chip drive circuits due to their ability to output their own input voltage exponentially. In the anti-fuse FPGA, the anti-fuse is a high-voltage primary programming device, in the programming process needs to isolate the anti-fuse from other devices through the high-voltage isolation transistor,and the high-voltage isolation transistor needs to be greater than the voltage of the chip power supply VCCA to drive when working, how to provide high voltage to ensure that the isolation transistor can transmit data without loss is a problem that must be considered when developing the anti-fuse FPGA. This paper proposes a charge pump circuit applied to the anti-fuse FPGA, the circuit has the characteristics of fast start-up, while the circuit working frequency is adjustable, by adding redundant NMOS structure in the circuit, improve the safety of the circuit in the work, the circuit can ensure that the fuse programming process in addition to the anti-fuse other devices are not affected by the programming voltage, and after the end of the programming through the charge pump output voltage to open the isolation transistor to complete the lossless transmission of the signal, It can meet the needs of anti-fuse anti-fuse FPGAs for charge pumps.

关 键 词：电荷泵 反熔丝 FPGA 

分 类 号：TN791[电子电信—电路与系统]