Wireless telemetries

Solutions are shielding, active opamp circuit clamping the body to ground (Chapter 8), increased distance to the noise source, increased common mode rejection circuitry (Chapter 8), averaging over several heart beats, and wireless telemetry of electrode pick-up signals. 

Suster M, et al. An optically powered wireless telemetry module for hightemperature MEMS sensing and communication. J Microelectromech Syst 2004. 

Figure 7.9 Block diagram of a conventional wireless telemetry system.

Microelectronics of Recording, Stimulation, and Wireless Telemetry for Neuroprosthetics Design and Optimization... 

These applications, by nature, impose serious limitations on power and area in the design of neural-recording systems. Researchers have developed several kinds of neural-recording systems [23-27], and those systems are generally composed of preamplifiers to amplify the small extracellular potentials, low-pass filters to reject the high frequency noise, multiplexers, and analog-to-digital converters (ADCs) followed by the wireless telemetry circuits to transmit data out of the body. 

To support these applications, a neural-recording system has to meet challenging requirements imposed by the environment. First, it should be able to record a large number of channels simultaneously and high-resolution recording can advance fundamental neuroscience studies and has the potential to improve the performance of neural prosthetic devices. Second, a wireless telemetry that transmits recorded neu-... 

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