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Abstract
In this paper, a DC/AC converter called inverter is proposed. This converter
includes 12V converting 110V and 12V converting 220V circuits. In 12V/110V
circuit, the IC555 generates a 240Hz signal that passes the IC4027 to obtain the
60Hz signal. By transistor C4016 and 12V/2V transformer, the signal is
amplified in current domain and matched in impedance. Finally, the signal is
amplified to 12V by transistor 2SC5200 and then converted to 110V AC by
12V/110V transformer. In 12V/220V circuit, the IC4047 generates an astable
signal that passes the IC LM324 called the voltage follower to obtain the 60Hz
signal. By the Darling Pair and CE configuration to amplify both current and
voltage, the generated signal then passes the 12V/220V transformer to obtain the
final output. The experiment results shows that the efficiency are 66.06％ and
58.33％ in 12V/110V and 12V/220V converters respectively. The circuits can
be applied to daily equipment and provide humans with another green power.
Keywords : Inverter, Impedance matching, Voltage follower, CE configuration,
Green power
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