Push-Pull Resoswitch Communication Receiver

A squegging-free all-mechanical communication receiver capable of receiving and demodulating up to 1 kbit/s full FSK inputs at -67.4 dBm sensitivity is demonstrated using push-pull operation of two frequency-spaced micromechanical resoswitches. Here, the use of pull-up and pull-down resoswitches is key to permitting well-controlled charging and discharging of a load capacitor and obviating the bleed resistor used in previous resoswitch receivers, reducing greatly the power draw when processing valid bits. The use of two resoswitches in concert not only permits reception of both mark and set FSK inputs to reap the benefits of full FSK reception not achieved by previous demonstrations, but also by removing squegging removes transition glitches that plagued the stability, i.e., degraded the Allan deviation, of previous resoswitch-based clock receivers.