3 research outputs found
Preamplifier for biological signals processing
PrĂĄce se zabĂœvĂĄ problematikou nĂĄvrhu a optimalizace zesilovaÄĆŻ v technologii CMOS s nĂzkĂœm napĂĄjecĂm napÄtĂm a nĂzkou spotĆebou. HlavnĂm zamÄĆenĂm prĂĄce je navrhnout zesilovaÄ pro zesĂlenĂ biologickĂœch signĂĄlu. V prvnĂ ÄĂĄsti prĂĄce je struÄnĂœ Ășvod do teorie biologickĂœch signĂĄlĆŻ. DĂĄle prĂĄce obsahuje struÄnĂœ popis metod zpracovĂĄnĂ biologickĂœch signĂĄlĆŻ a jejich vlastnosti. DĆŻleĆŸitou ÄĂĄstĂ prĂĄce je popis metod pro snĂĆŸenĂ napĂĄjecĂ napÄtĂ zesilovaÄe. PraktickĂĄ ÄĂĄst tĂ©to prĂĄce je zamÄĆena na nĂĄvrh zesilovaÄe s nĂzkĂœm napĂĄjecĂm napÄtĂm a s nĂzkou spotĆebou. VĆĄechny aktivnĂ prvky a pĆĂklady aplikacĂ byly ovÄĆeny pomocĂ PSpice simulacĂ s vyuĆŸitĂm parametrĆŻ technologie 0,18 ”m TSMC CMOS. Pro ilustraci chovĂĄnĂ struktur je v diplomovĂ© prĂĄci zahrnuty simulaÄnĂ vĂœsledky.The work deals with the design and optimization of amplifiers in CMOS technology with low supply voltage and low power consumption. The main aim is to design an amplifier to amplify the biological signal. The first part is a brief introduction to the theory of biological signals. The work also contains a brief description of the biological signal processing methods and their properties. The important part is the description of the methods to reduce the supply voltage of the amplifier. The practical part of this thesis focuses on the design amplifiers with low supply voltage and low power consumption. All active elements and application examples have been verified by PSpice simulator using the 0.18 ”m TSMC CMOS parameters. Simulated plots are included in this thesis to illustrate behavior of structures.
Design of low-voltage operational amplifier
Tato prĂĄce se zabĂœvĂĄ nĂĄvrhem operaÄnĂho zesilovaÄe s extrĂ©mnÄ nĂzkĂœm napĂĄjecĂm napÄtĂm a nĂzkou spotĆebou. V teoretickĂ© ÄĂĄsti je pĆedstavena teorie zabĂœvajĂcĂ se strukturou a nĂĄvrhem operaÄnĂho zesilovaÄe. V nĂĄsledujĂcĂ ÄĂĄsti jsou popsĂĄny nĂĄvrhovĂ© metody vhodnĂ© k realizaci nĂzkonapÄĆ„ovĂœch obvodĆŻ. V dalĆĄĂ ÄĂĄsti byly navrhnuty dva operaÄnĂ zesilovaÄe s pouĆŸitĂm nĂzkonapÄĆ„ovĂœch metod. Vlastnosti tÄchto operaÄnĂch zesilovaÄĆŻ byly potĂ© ovÄĆeny simulacemi.This work deals with the design of operational amplifier with extremely low supply voltage and low power consumption. In the theoretical part is presented theory dealing with the structure and design of operational amplifier. In the following part are desribed design methods suitable for realization of low-voltage circuits. In the next part were designed two operational amplifiers using low-voltage design methods. Properties of these operational amplifiers were then tested by simulations.
Low Voltage Low Power Analogue Circuits Design
DisertaÄnĂ prĂĄce je zamÄĆena na vĂœzkum nejbÄĆŸnÄjĆĄĂch metod, kterĂ© se vyuĆŸĂvajĂ pĆi nĂĄvrhu analogovĂœch obvodĆŻ s vyuĆŸitĂ nĂzkonapÄĆ„ovĂœch (LV) a nĂzkopĆĂkonovĂœch (LP) struktur. Tyto LV LP obvody mohou bĂœt vytvoĆeny dĂky vyspÄlĂœm technologiĂm nebo takĂ© vyuĆŸitĂm pokroÄilĂœch technik nĂĄvrhu. DisertaÄnĂ prĂĄce se zabĂœvĂĄ prĂĄvÄ pokroÄilĂœmi technikami nĂĄvrhu, pĆedevĆĄĂm pak nekonvenÄnĂmi. Mezi tyto techniky patĆĂ vyuĆŸitĂ prvkĆŻ s ĆĂzenĂœm substrĂĄtem (bulk-driven - BD), s plovoucĂm hradlem (floating-gate - FG), s kvazi plovoucĂm hradlem (quasi-floating-gate - QFG), s ĆĂzenĂœm substrĂĄtem s plovoucĂm hradlem (bulk-driven floating-gate - BD-FG) a s ĆĂzenĂœm substrĂĄtem s kvazi plovoucĂm hradlem (quasi-floating-gate - BD-QFG). PrĂĄce je takĂ© orientovĂĄna na moĆŸnĂ© zpĆŻsoby implementace znĂĄmĂœch a modernĂch aktivnĂch prvkĆŻ pracujĂcĂch v napÄĆ„ovĂ©m, proudovĂ©m nebo mix-mĂłdu. Mezi tyto prvky lze zaÄlenit zesilovaÄe typu OTA (operational transconductance amplifier), CCII (second generation current conveyor), FB-CCII (fully-differential second generation current conveyor), FB-DDA (fully-balanced differential difference amplifier), VDTA (voltage differencing transconductance amplifier), CC-CDBA (current-controlled current differencing buffered amplifier) a CFOA (current feedback operational amplifier). Za ĂșÄelem potvrzenĂ funkÄnosti a chovĂĄnĂ vĂœĆĄe zmĂnÄnĂœch struktur a prvkĆŻ byly vytvoĆeny pĆĂklady aplikacĂ, kterĂ© simulujĂ usmÄrĆovacĂ a induktanÄnĂ vlastnosti diody, dĂĄle pak filtry dolnĂ propusti, pĂĄsmovĂ© propusti a takĂ© univerzĂĄlnĂ filtry. VĆĄechny aktivnĂ prvky a pĆĂklady aplikacĂ byly ovÄĆeny pomocĂ PSpice simulacĂ s vyuĆŸitĂm parametrĆŻ technologie 0,18 m TSMC CMOS. Pro ilustraci pĆesnĂ©ho a ĂșÄinnĂ©ho chovĂĄnĂ struktur je v disertaÄnĂ prĂĄci zahrnuto velkĂ© mnoĆŸstvĂ simulaÄnĂch vĂœsledkĆŻ.The dissertation thesis is aiming at examining the most common methods adopted by analog circuits' designers in order to achieve low voltage (LV) low power (LP) configurations. The capability of LV LP operation could be achieved either by developed technologies or by design techniques. The thesis is concentrating upon design techniques, especially the nonâconventional ones which are bulkâdriven (BD), floatingâgate (FG), quasiâfloatingâgate (QFG), bulkâdriven floatingâgate (BDâFG) and bulkâdriven quasiâfloatingâgate (BDâQFG) techniques. The thesis also looks at ways of implementing structures of wellâknown and modern active elements operating in voltageâ, currentâ, and mixedâmode such as operational transconductance amplifier (OTA), second generation current conveyor (CCII), fullyâdifferential second generation current conveyor (FBâCCII), fullyâbalanced differential difference amplifier (FBâDDA), voltage differencing transconductance amplifier (VDTA), currentâcontrolled current differencing buffered amplifier (CCâCDBA) and current feedback operational amplifier (CFOA). In order to confirm the functionality and behavior of these configurations and elements, they have been utilized in application examples such as diodeâless rectifier and inductance simulations, as well as lowâpass, bandâpass and universal filters. All active elements and application examples have been verified by PSpice simulator using the 0.18 m TSMC CMOS parameters. Sufficient numbers of simulated plots are included in this thesis to illustrate the precise and strong behavior of structures.