Asynchronous digital communication module

A digital transmitting module included in a host device connectable to a client device, the digital transmitting module comprising:

• a clock generator which provides the host device with a clock whose one cycle is comprised of T1, T2, T3 and T4 connected sequentially;
• and
• a voltage encoder which receives the clock from the clock generator, receives a digital bit from the host device, generates a voltage pulse by encoding the digital bit based on the clock, and then transmits the voltage pulse to the client device,
• wherein the voltage encoder generates the voltage pulse such that a voltage level of the voltage pulse is maintained at a first voltage level during T1 and T4, increases the voltage level of the voltage pulse from the first voltage level to a second voltage level in an inpulse form during T2 of the clock and gradually reduces the voltage level of the voltage pulse from the second voltage level to the first voltage level during T3 of the clock when the digital bit is 1 and gradually increases the voltage level of the voltage pulse from the first voltage level to the second voltage level during T2 of the clock and reduces the voltage level of the voltage pulse from the second voltage level to the first voltage level in the inpulse form during T3 of the clock when the digital bit is 0 or increases the voltage level of the voltage pulse from the first voltage level to the second voltage level in the inpulse form during T2 of the clock and gradually reduces the voltage level of the voltage pulse from the second voltage level to the first voltage level during T3 of the clock when the digital bit is 0 and gradually increases the voltage level of the voltage pulse from the first voltage level to the second voltage level during T2 of the clock and reduces the voltage level of the voltage pulse from the second voltage level to the first voltage level in the inpulse form during T3 of the clock when the digital bit is 1.

A digital transmitting module included in a host device connectable to a client device, the digital transmitting module comprising:

• a clock generator which provides the host device with a clock whose one cycle is comprised of T1, T2, T3 and T4 connected sequentially;
• and
• a voltage encoder which receives the clock from the clock generator, receives a digital bit from the host device, generates a voltage pulse by encoding the digital bit based on the clock, and then transmits the voltage pulse to the client device,
• wherein the voltage encoder generates the voltage pulse such that a voltage level of the voltage pulse is maintained at a first voltage level during T1 and T4, reduces the voltage level of the voltage pulse from the first voltage level to a second voltage level in an inpulse form during T2 of the clock and increases the voltage level of the voltage pulse from the second voltage level to the first voltage level in the form of a step function having N steps during T3 of the clock when the digital bit is 1 and reduces the voltage level of the voltage pulse from the first voltage level to the second voltage level in the form of the step function having the N steps during T2 of the clock and increases the voltage level of the voltage pulse from the second voltage level to the first voltage level in the inpulse form during T3 when the digital bit is 0 or reduces the voltage level of the voltage pulse from the first voltage level to the second voltage level in the inpulse form during T2 of the clock and increases the voltage level of the voltage pulse from the second voltage level to the first voltage level in the form of the step function having the N steps during T3 of the clock when the digital bit is 0 and reduces the voltage level of the voltage pulse from the first voltage level to the second voltage level in the form of the step function having the N steps during T2 and increases the voltage level of the voltage pulse from the second voltage level to the first voltage level in the inpulse form during T3 when the digital bit is 0.

A digital transmitting module included in a host device connectable to a client device, the digital transmitting module comprising:

• a clock generator which provides the host device with a clock whose one cycle is comprised of T1, T2, T3 and T4 connected sequentially;
• and
• a voltage encoder which receives the clock from the clock generator, receives a digital bit from the host device, generates a voltage pulse by encoding the digital bit based on the clock, and then transmits the voltage pulse to the client device,
• wherein the voltage encoder generates the voltage pulse such that a voltage level of the voltage pulse is maintained at a first voltage level during T1 and T4, increases the voltage level of the voltage pulse from the first voltage level to a second voltage level in an inpulse form during T2 of the clock and reduces the voltage level of the voltage pulse from the second voltage level to the first voltage level in the form of a step function having N steps during T3 of the clock when the digital bit is 1 and increases the voltage level of the voltage pulse from the first voltage level to the second voltage level in the form of the step function having the N steps during T2 of the clock and reduces the voltage level of the voltage pulse from the second voltage level to the first voltage level in the inpulse form during T3 when the digital bit is 0 or increases the voltage level of the voltage pulse from the first voltage level to the second voltage level in the inpulse form during T2 of the clock and reduces the voltage level of the voltage pulse from the second voltage level to the first voltage level in the form of the step function having the N steps during T3 of the clock when the digital bit is 0 and increases the voltage level of the voltage pulse from the first voltage level to the second voltage level in the form of the step function having the N steps during T2 and reduces the voltage level of the voltage pulse from the second voltage level to the first voltage level in the inpulse form during T3 when the digital bit is 0.