Synchronization in biotelemetry systems with time division of channels

In order to improve synchronization in biotelemetry systems, a relative pulse-width selector was designed. It employs a sawtooth generator, sample-and-hold and analogue comparator. The use of this selector creates a possibility of reducing the increase in the synchronizing pulse with respect to the channel pulses and eliminating tuning the transmitter's modulator and receiver's selector to each other. Two different selectors are described: a simple one for two different pulse widths and a more complicated one with a counter for any setting of pulse width in the system.