Circuit structure with a double-gate organic thin film transistor device and application thereof

An inverter circuit structure with a double-gate organic thin film transistor device, comprising:

• an enhanced-type thin film transistor device having a gate terminal, a first source terminal, a first drain terminal and a first N channel area, said gate terminal coupled to an input and said first drain terminal coupled to an output;
• and
• a depletion-type double-gate thin film transistor device having a first gate terminal, a second source terminal, a second drain terminal, a second N channel area and a second gate terminal, wherein said first gate terminal and said second gate terminal share said second source terminal, said second drain terminal and said second N channel area, said first gate terminal is coupled to said second drain terminal, said second gate terminal is coupled to a variable bias voltage by which a voltage applied to said second gate terminal is adjustable so that said doube-gate thin film transistor device becomes depletion-type, and said second source terminal is coupled to said output.