Arrange in increasing order of the transistors used in the below mentioned circuits.(i) TTL NAND (Totem Pole Circuit)(ii) DTL NAND Gate(iii) ECL NOR Gate(iv) CMOS inverter

DTL NAND Gate has only one transistor and TTL NAND Gate has 3 transistor.Hence, Option 2 is correct.DTL:DTL (diode-transistor logic) circuit is a combination of BJT, diode, and resistors.DTL is the improved version of TTLDTL provides wired logic by diode networkDTL is an AND logicDTL circuit diagram:The main disadvantage of the DTL logic circuit is:It has a very large gate propagation delayOutput goes into saturation for a high input valueProduce large heat during OPERATION CMOS Inverter:The voltage Transfer characteristic curve of CMOS Inverter is calculated as:\(\left. {\begin{array}{*{20}{c}} {Region\;\left( 1 \right) \to {V_i} < {V_{th}}\;NMOS\;OFF}\\ {Region\;\left( 2 \right) \to {V_i} > {V_{D0}} - \left| {{V_{ip}}} \right|\;\;PMOS\;OFF} \END{array}} \right\}\)In this region, CMOS Inverter can be used as a NOT Gate.Region (3): CMOS inverter can be used as an amplifier because small changes in input voltage (in mV) can cause a large change in output voltage.Emitter-coupled-logic (ECL):Emitter-coupled-logic (ECL) is a BJT logic family which is generally considered as the fastest logic available.ECL achieves its high-speed operation by employing a relatively small voltage swing and preventing the transistors from entering the saturation region. (Reduces the storage delay time).ECL transistor uses differential amplifier configuration as shown: TTL:Logic FamilyFull NameAdvantagesDisadvantagesCMOSComplementary metal-oxide-semiconductorLowest power consumptionUsed in all microcomputer chips today.Most common logic family.Easily damaged by static discharge and voltage spikes.TTLTransistor-transistor logicEarliest developed.Most rugged.Least susceptible to ELECTRICAL damage.Consumes more power than CMOS – not suitable for battery-operated devices.ECLEmitter-coupled logicFastest available logic familyConsumes more power than CMOS. It REQUIRES extreme care in the wiring.