Tuesday 15 June Wednesday 16 June Thursday 17 June Friday 18 June Saturday 19 June Sunday 20 June Monday 21 June Tuesday 22 June Wednesday 23 June Thursday 24 June Friday 25 June Saturday 26 June Sunday 27 June Monday 28 June Tuesday 29 June Wednesday 30 June Thursday 1 July Friday 2 July Saturday 3 July Sunday 4 July Monday 5 July Tuesday 6 July Wednesday 7 July Thursday 8 July Friday 9 July Saturday 10 July Sunday 11 July Monday 12 July Tuesday 13 July Wednesday 14 July Thursday 15 July Friday 16 July Saturday 17 July Sunday 18 July Monday 19 July Tuesday 20 July Wednesday 21 July Thursday 22 July Friday 23 July Saturday 24 July Sunday 25 July Monday 26 July Tuesday 27 July Wednesday 28 July Thursday 29 July Friday 30 July Saturday 31 July Sunday 1 August Monday 2 August Tuesday 3 August Wednesday 4 August Thursday 5 August Friday 6 August Saturday 7 August Sunday 8 August Monday 9 August Tuesday 10 August Wednesday 11 August Thursday 12 August Friday 13 August Saturday 14 August Sunday 15 August Monday 16 August Tuesday 17 August Wednesday 18 August Thursday 19 August Friday 20 August Saturday 21 August Sunday 22 August Monday 23 August Tuesday 24 August Wednesday 25 August Thursday 26 August In this gate, output of logic gate is false only when both the inputs are true.
It is the complement of AND gate. NOR gate: Output of this logic gate is true when both inputs are false. Propagation delay :. It is the time required for a digital signal to travel from the input s of a logic gate to the output ad is denoted by t pd.
In the case of a digital IC, the propagation delay of a gate is the average transition time that a signal takes from input to output, i. Units — ns nanoseconds i. Start Learning. Win over the concepts of Logic Families and get a step ahead with the preparations for Digital Electronics with Testbook.
CMOS has the highest fan-out among the given logic families. Get Started for Free Download App. Concept: In a Common Emitter transistor, if input A is at low potential Logic0 than, there is no voltage drop across Base Emitter junction and hence no current will flow through the Transistor Cut Off state.
In a Common Emitter transistor, if input A is at high potential Logic1 than, there will be a voltage drop across Base Emitter junction and hence current will flow through the Transistor Saturation state. Answer Detailed Solution Below Option 1 : 1. Concept: Noise Margin It is the amount of noise that can be allowed without disturbing the normal operation of the logic gates. TTL logic has very low power consumption and is therefore widely used in highly integrated components TTL devices have logic levels of about 3.
Answer Detailed Solution Below Option 1 : TTL logic has very low power consumption and is therefore widely used in highly integrated components. The most important parameters for evaluating and comparing logic families are: Power dissipation Propagation delay Noise margin Fan-out loading General comparison of three commonly available logic families is explained in the following table: Logic Family Advantages Disadvantages CMOS Lowest power consumption Used in all microcomputer chips today.
Most common logic family. Easily damaged by static discharge and voltage spikes. TTL Earliest developed. Most rugged. Least susceptible to electrical damage. Concept : The terms positive logic and negative logic refer to two conventions that tell the relationship between logical values and the voltages used to represent them. Positive Logic Convention: In this, the more positive potential is considered to represent true or logic 1, and the more negative potential is considered to represent false or logic 0.
Negative Logic Convention: In this, the more negative potential is considered to represent true or logic 1, and the more positive potential is considered to represent false or logic 0. Calculation: Two voltages are given -2 V and -1 V As we have to represent them in the positive logic convention: -2 V will represent logic 0 as it is more negative and -1 V will represent logic 1. Hence option 3 is the correct answer. Gain and bandwidth Propagation delay time and power dissipation Fan-out and propagation delay time Noise margin and power dissipation.
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. TTL Transistor-transistor logic 1 Earliest developed. Unlimited Streaming Listen to this album in high quality now on our apps Start my trial period and start listening to this album.
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