A miniature wireless apparatus for collecting physiological signals
comprises an electrode pair, an amplifier module, a microcontroller, a
wireless module, and a battery. The electrode pair collects a pair of
physiological signals of a person under test. The amplifier module
amplifies the pair of physiological signals. The microcontroller performs
an analog-to-digital conversion and a data compression for an amplified
physiological signal generated by the amplifier module. The wireless
module modulates a digital physiological signal generated by the
microcontroller and transmitting the modulated digital physiological
signal to a receiver at the far end. The apparatus can be implemented by
a structure of multilayered circuit boards. With the progress of
semiconductor technology, all the components of the miniature wireless
apparatus can be further integrated to one circuit board, or even one
chip.