PERANCANGAN RANGKAIAN TERINTEGRASI PENGUAT BIO KEDOKTERAN DENGAN TEKNOLOGI CMOS

• Main Author: Susanthi, Yohana
• Format: Theses
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/1151
• Institution: Institut Teknologi Bandung

Bio medical amplifier is an amplifier which can be used to amplify bio electric potential. Because it is generally relatively small, which is between 25?V and 90mV, bio electric potential needs to be amplified, so that it can be processed further. The integrated circuit of the bio medical amplifier made in this thesis consist of pre amplifier, filter, final amplifier and buffer, using seven operational amplifiers. The specifications of the above amplifier is as follows: <br /> - total gain : ? 1000 times <br /> - band width : 0.01 Hz — 4000Hz <br /> - noise voltage : ? 5?V/?Hz <br /> - CMRR pre amplifier :? 80 dB <br /> - power supply : -5V — +5V <br /> - input impedance pre amplifier : ? 5M ? <br /> The design of the bio medical amplifier is started by designing an operational amplifier, i.e. 2 stage operational amplifier CMOS which consist of ten transistors, with following characteristics : <br /> - the low frequency gain ; Ao ? 70 dB <br /> - phase margin ; ØM ? 60° <br /> - unity gain band width ; fo ? 1MHz. <br /> - slew rate Sr ? 2V/?s <br /> - CMRR ? 70 dB <br /> Using the data mentioned above the size of each transistors (W/L) is calculated. After W/L of each transistors is obtained, the operational amplifier is simulated with SPICE. When the result of operational amplifier simulation match the desired criteria, the operational amplifier will be used as sub circuit of the bio medical amplifier. The next step is the design of the circuit lay-out of the bio medical amplifier using KIC software. By considering the lay-out, simulation with SPICE is done again to take in to account the parasitic capasitances. The chip's size of this bio medical amplifier is 2926?m x 1033?m included pad. <br />