What is figure of merit in logic families?
Figure of merit is a product of propagation delay and power dissipation. It is measured in terms of Pico-Joules (ns ´mW = pJ). Current and voltage parameters define the minimum and maximum limit of current and voltage for input and output of a logic family.
What is figure of merit in TTL?
The figure of merit (FOM) is defined as: FOM = (delay in ns) x (power in W) x (area in µm2) / (frequency in GHz) Through a careful consideration of resistor values, we achieved the FOMs shown in Table 1 below. The resistor values used are shown in Table 2 below.
Which are the characteristics of logic families?
The main characteristics of Logic families include:
- Speed.
- Fan-in.
- Fan-out.
- Noise Immunity.
- Power Dissipation.
What is logic family state different types of logic families?
Types of Logic Family
- Diode logic (DL)
- Resistor Transistor Logic (RTL)
- Diode Transistor Logic (DTL)
- Integrated Injection Logic (IIL or I2L)
- Transistor Transistor Logic (TTL)
What is the significance of figure of merit?
A figure of merit is a quantity used to characterize the performance of a device, system or method, relative to its alternatives. In engineering, figures of merit are often defined for particular materials or devices in order to determine their relative utility for an application.
What are the types of TTL logic?
The types of TTL or transistor-transistor logic mainly include Standard TTL, Fast TTL, Schottky TTL, High power TTL, Low power TTL & Advanced Schottky TTL. The designing of TTL logic gates can be done with resistors and BJTs.
What is power dissipation in logic families?
Power dissipation is the supplied power required to operate the desired logic function. This parameter does not include the power delivered from another gate. Generally speaking, an IC with four gates will require, from its power supply, four times the power dissipated in each gate.
What are the characteristics of logic families explain saturated logic families?
The characteristics which are bound to be identical are supply voltage range, speed of response, dissipation of power, input and output logic levels, current sinking capability, current sourcing capability, noise margin, fan-out etc.
What are the analytical figures of merit?
Figures of merit are a way for analytical chemists to characterize a method. The six figures of merit we will use are precision, accuracy, sensitivity, linear dynamic range, detection limit, and selectivity.
What is the figure of Merit of a logic family?
The figure of merit of a logical family is the product of power dissipation and propagation delay. It is called as the speed power product. The speed is specified in seconds and power is specified in watts. Practically, the value of figure of merit should be as low as possible.
What are the different types of logic families?
According to the components used, there are different types of logic families. Some of the logic families include Resistor-Transistor logic (RTL), Diode-Transistor logic (DTL), Transistor-transistor logic (TTL), Emitter coupled logic (ECL), PMOS, NMOS, and CMOS circuits. They are classified into several types as shown below.
What are the characteristics of a TTL logic family?
Characteristics of TTL Logic Families The output of a TTL device can serve as an input to a maximum of 10 gates, i.e., the fan-out is 10. A logic low voltage for a TTL is defined between 0V-0.2V. A logic high voltage for a TTL is at 5V.
How are the emitters of a logic family connected?
The emitters of the transistors are connected all together, hence the name ‘emitter-coupled’ logic families. The transistors in this system never saturate; their logic high and logic low levels are chosen close to one another, thus eliminating the possibility of saturation in the transistors.