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power dissipation of a logic circuit is usually defined as the supply power required for the gate to operate with a 50% duty cycle at a specific frequency.
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Speed-power product OF TTL?
The product of propagation delay and power dissipation is called Speed power product.
What are the available transistor-transistor logic subfamilies?
§ Low-power TTL (L), which traded switching speed (33ns) for a reduction in power consumption (1 mW) (now essentially replaced by CMOS logic)§ High-speed TTL (H), with faster switching than standard TTL (6ns) but significantly higher power dissipation (22 mW)§ Schottky TTL (S), introduced in 1969, which used Schottky diode clamps at gate inputs to prevent charge storage and improve switching time. These gates operated more quickly (3ns) but had higher power dissipation (19 mW)§ Low-power Schottky TTL (LS)- used the higher resistance values of low-power TTL and the Schottky diodes to provide a good combination of speed (9.5ns) and reduced power consumption (2 mW), and PDP of about 20 pJ. Probably the most common type of TTL, these were used as glue logic in microcomputers, essentially replacing the former H, L, and S sub-families.§ Fast (F) and Advanced-Schottky (AS) variants of LS from Fairchild and TI, respectively, circa 1985, with "Miller-killer" circuits to speed up the low-to-high transition. These families achieved PDPs of 10 pJ and 4 pJ, respectively, the lowest of all the TTL families.§ Low-voltage TTL (LVTTL) for 3.3-volt power supplies and memory interfacing.
What is the key difference between old computers and the present day computers?
vacuum tubes, large sized, high power dissipation, high voltagestransistors, medium sized, medium power dissipation, low voltagesintegrated circuits, small size, medium power dissipation, low voltagesmicroprocessors, very small size, low power dissipation, low voltages
Which of the technology results in least power dissipation?
CMOS
Which logic family has lowest power dissipation?
cmos
Speed-power product OF TTL?
The product of propagation delay and power dissipation is called Speed power product.
What is the difference between TTL and CMOS interms of fan infan outlogic levelspropagation delay?
The power dissipation of CMOS devices is around 100 times lower than the value of power dissipation for TTL. This makes CMOS more suitable for devices to run on battery power and devices allows like mobile phones to have a longer batter life. CMOS devices only use power when switching from one state to the other state (high to low, or low to high) so on they need power for less of the time than TTL devices which use current and dissipate power all the time that they have a power supply.
What are the different types of power dissipation?
static power dissipation dynamic power dissipation short circuit power dissipation
Why shouldn't totem-pole outputs be wire anded?
Totem pole TTL has the advantage of high speed and low power dissipation but itsdisadvantage is that it cannot be wired ANDed because of current spikes generation.
What are the available transistor-transistor logic subfamilies?
§ Low-power TTL (L), which traded switching speed (33ns) for a reduction in power consumption (1 mW) (now essentially replaced by CMOS logic)§ High-speed TTL (H), with faster switching than standard TTL (6ns) but significantly higher power dissipation (22 mW)§ Schottky TTL (S), introduced in 1969, which used Schottky diode clamps at gate inputs to prevent charge storage and improve switching time. These gates operated more quickly (3ns) but had higher power dissipation (19 mW)§ Low-power Schottky TTL (LS)- used the higher resistance values of low-power TTL and the Schottky diodes to provide a good combination of speed (9.5ns) and reduced power consumption (2 mW), and PDP of about 20 pJ. Probably the most common type of TTL, these were used as glue logic in microcomputers, essentially replacing the former H, L, and S sub-families.§ Fast (F) and Advanced-Schottky (AS) variants of LS from Fairchild and TI, respectively, circa 1985, with "Miller-killer" circuits to speed up the low-to-high transition. These families achieved PDPs of 10 pJ and 4 pJ, respectively, the lowest of all the TTL families.§ Low-voltage TTL (LVTTL) for 3.3-volt power supplies and memory interfacing.
What is the difference between power consumption and power dissipation?
A: POWER consumption is total power usage power dissipation is wasted power in the form of heat, IR drop and so on.
What are the disadvantages of TTL logic family?
Briefly, TTL uses more power than more modern families.
What is the key difference between old computers and the present day computers?
vacuum tubes, large sized, high power dissipation, high voltagestransistors, medium sized, medium power dissipation, low voltagesintegrated circuits, small size, medium power dissipation, low voltagesmicroprocessors, very small size, low power dissipation, low voltages
Can power dissipation be prevented?
A: All devices have some kind of power dissipation. That is because some quiescent current must flow to keep them alive or functional
What is the formula to calculate power dissipation?
P=ir2
Which of the technology results in least power dissipation?
CMOS
Which logic family has lowest power dissipation?
cmos
