Provided are a switched capacitor amplifier capable of removing an influence of an offset voltage and a 1f noise using a simple circuit, and a method of operating the same. Exemplary embodiments include a method including creating an event having an event time in the electronic calendar, creating a first reminder associated with the event and configured to activate at a first time prior to the event and creating another reminder associated with the event and configured to activate at a second time prior to the event and after the first time. At least one panel is positioned between consecutive support posts. The electronic device further includes a plurality of first Phase Shifters configured to shift a phase of Radio Frequency signals received via the antennas and the transmitter and receiver switches. Such simulation allows trainees to perform regional anesthesia techniques that closely mimic real world medical procedures before performing procedures on live patients. The resultant fetuses, embryos or offspring are especially useful for the expression of desired heterologous DNAs, and may be used as a source of cells or tissue for transplantation therapy for the treatment of diseases such as Parkinson’s disease.