====== Charge pump voltage multiplier ======
  * Analyze the circuit in the figure below. Determine the waveforms V<sub>A</sub> and V<sub>B</sub> in steady state

{{:courses:ec330:exp3a.png?200}}

  * Transistors are added to multiplex V<sub>A</sub> and V<sub>B</sub> and result in V<sub>out</sub>. Implement this circuit using CD4069 inverters. __Think carefully about which terminal goes where!__ You'll need to use separate ICs for the inverter and the rest of the circuitry because, on a chip, the supply and ground pins are all shorted together. You can use clock frequencies in the tens of kHz range, capacitors in the 10nF range, and a supply of 5V. 

{{vdoubler.png?400}}

  * What is the output voltage V<sub>out</sub> with no load(C<sub>L</sub>)? and with a constant current load I<sub>L</sub>? 

  * Build and demonstrate a circuit that gives an output of approximately three times the power supply.