315-MHz Self-Acceleration Start-Up OOK Super-Regenerative Wireless Receiver

A novel 315-MHz OOK self-quenching super-regenerative wireless receiver is presented in this letter. A self-acceleration start-up mechanism is proposed, which employs a positive feedback to speed up the start-up time of super-regenerative oscillator for the "1" input signals. An adaptive reference generation is proposed to track the strength of input signal dynamically. The presented receiver can alleviate the design difficulties of the demodulation circuit and improve the rejection of interferences effectively. The prototype chip is fabricated with Central Semiconductor Manufacturing Corporation 0.5- \mu \text{m} mixed CMOS process. The chip area is 770\,\,\mu \text{m}\,\,\times680\,\,\mu \text{m} and the current consumption is 2.5 mA with 5-V supply voltage. The measurement results show that the sensitivity of the proposed receiver improves 11 dB for 2-kb/s OOK input signal when the self-acceleration start-up is activated.