Is the Power Consumption of TTL Higher than CMOS and Why?

AI Thread Summary
TTL consumes more power than CMOS primarily due to its reliance on bipolar junction transistors (BJTs), which have higher static power consumption. The base-emitter diode drop in BJTs contributes to this increased power usage. Additionally, TTL circuits have a higher ON resistance compared to the lower ON resistance of MOSFETs used in CMOS technology. The inherent characteristics of BJTs lead to greater energy dissipation during operation. Understanding these differences is crucial for applications requiring efficient power management.
likephysics
Messages
638
Reaction score
4
Why does TTL consume more power than CMOS?
I googled but did not find any useful information.
I can think of the Base emitter diode drop as one cause. But are there other reasons why TTL consumes more power.
Can I compare the ON resistance of MOSFETs Vs BJTs?
 
Engineering news on Phys.org
Anyone?
 

Thread '3-terminal device external modeling'

Very basic question. Consider a 3-terminal device with terminals say A,B,C. Kirchhoff Current Law (KCL) and Kirchhoff Voltage Law (KVL) establish two relationships between the 3 currents entering the terminals and the 3 terminal's voltage pairs respectively. So we have 2 equations in 6 unknowns. To proceed further we need two more (independent) equations in order to solve the circuit the 3-terminal device is connected to (basically one treats such a device as an unbalanced two-port...
View full post »

Thread 'Question about the voltage between two charged capacitors'

suppose you have two capacitors with a 0.1 Farad value and 12 VDC rating. label these as A and B. label the terminals of each as 1 and 2. you also have a voltmeter with a 40 volt linear range for DC. you also have a 9 volt DC power supply fed by mains. you charge each capacitor to 9 volts with terminal 1 being - (negative) and terminal 2 being + (positive). you connect the voltmeter to terminal A2 and to terminal B1. does it read any voltage? can - of one capacitor discharge + of the...
View full post »
Thread 'Weird near-field phenomenon I get in my EM simulation'

Thread 'Weird near-field phenomenon I get in my EM simulation'

I recently made a basic simulation of wire antennas and I am not sure if the near field in my simulation is modeled correctly. One of the things that worry me is the fact that sometimes I see in my simulation "movements" in the near field that seems to be faster than the speed of wave propagation I defined (the speed of light in the simulation). Specifically I see "nodes" of low amplitude in the E field that are quickly "emitted" from the antenna and then slow down as they approach the far...
View full post »

Similar threads

CMOS vs. BJT: Which is Better for Power Management Circuit Design?
Replies
1
Views
5K
Series diode and a low power device
Replies
10
Views
2K
Worst-case power consumed by a circuit with MOSFETs
Replies
2
Views
922
Understand the Current Consumption of an IC in its Datasheet
Replies
5
Views
5K
Comparing TTL and CMOS Gate Characteristics
Replies
7
Views
4K
Why Choose IGBT Over MOSFET for Low-Frequency Applications?
Replies
10
Views
6K
Funny observation in matching BJT power transistors
Replies
19
Views
2K
Resistive heating power AC vs rectified AC/DC
Replies
10
Views
4K
How does an equivalent impedance consume a real power?
Replies
12
Views
3K
Thermal Dissipation of High-Power Electronic Subassemblies
Replies
15
Views
2K

Hot Threads

Recent Insights

Back
Top