R-less and C-less self-sampled ASK demodulator for lower ISM band applications

An ASK demodulator with a high bandwidth for lower ISM band frequencies is presented. A total of 15 MOS transistors are used in the proposed design without using any passive element. It is very compact to be integrated in an SOC (system-on-chip) for wireless communication biomedical applications, particularly in biomedical implant. The proposed design with a low area cost and low power consumption is easily to be integrated in other mobile medical devices. The self-sampled loop with a MOS equivalent capacitor compensation mechanism enlarges the bandwidth, which is more than enough to be adopted in any application using lower ISM bands.