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47 Threads found on edaboard.com: Low Power Clock Design
100mV RMS in an 8 ohm speaker produces a power output of only 1.25mW which is almost nothing. The low power of 81mW in an 8 ohm speaker is produced by an RMS voltage of 0.8V. A cheap clock radio can produce 500mW which is 2V RMS in 8 ohms. - - - Updated - - - A speaker produces a strong resonance. It is damp
One issue with manually powering off the LCD, when it is powered up again it will require a delay in the order of 30ms to 50ms for the display controller chipset (HD44780 compatible) to fully initialize and be ready to accept input from the microcontroller. A better approach would be to utilize a couple of BJTs or MOSFETs in between the (...)
If you want LiPO power, I suggest LCD instead for low current. 8x1 or logic out are 25 Ohm drivers so no problem with 10 Ohm ESR LEDs at 2.2V FWIW... and 1 ppm TCXO is only $1
Is there any relationship among resource utilization and total power consumption of digital design??? If it is so, then can you justify the the following ??? (generated using Libero IDE) design 1: Core Cells: 7 of 260 (3%) IO Cells : 10 Total power consumption : 4.998 mW Static power (...)
Hi Guys. Recently, I'm getting interested in the PRN Generator Using Linear Feedback Shifting Register(LFSR). If low power Performance is desired, which Logic Type and clock strategy are preferred.
We need to achieve all of these together. Only power might be a issue in low power. Apart from that all the others r required. You need to signoff with the all the above checks.
1- for our experience more than 10years, we design low power chip, the manual gated clock instertion is well know control than what it is done by the tool, or we do not see interesting power reduction based on our gated clock design. 2- yes, a combinational logic is added (...)
Hi i am making a project using VHDL and i wanted to use some low power techniques to optimize my design. I have used clock gating already.What are the other techniques i can use? I wanted to implement Multiple Vdd or supply voltages technique. What are the ways to implement it?? I have heard about Common (...)
Hi Given multiple mux choices(2:1, 4:1, 8:1,10:1 muxes), how do you design a 40:1 clock mux for low power? There is no limit to the the number of the standard muxes you can choose. Thanks
Here are some low power techniques. 1. Architectural Level: Pipelining and asynchronous. 2. design Level: Multi VT, clock gating, power gating, multi VDD and DVFS. 3. Process Technology: Silicon on Insulator, multi VT, Body Biasing, FinFET. Search in google to know details of each technique .
the question is way to high level to have a precise answer - first which power leakage or dynamic some optimizations / tricks mentioned below - clock Gating - Annotating activity during synthesis - MultiVt Synthesis - use CPF / UPF to achieve more savings depending on design architecture and application for eg (...)
Hi Kothandapani, The concept of clock gating is very simple. When you have a block in your architecture, which will not be used for certain amount of clock cycles, then it is wise to switch it off right? It is the basis of clock gating. ie. low power design methodology. Now, coming to your (...)
go through synopsys low power design manual. u can find detailed description on power gating techniques.
any one doing ultra low power (low voltage as well) flip flop. Please advise,:
It doesn't exactly cut the clock tree, it prevents the registers from switching. clock gating at the global clock tree level should give sligthly better effect. If it's suitable for your design depend on the clock domain scheme which we can't know. However, if the design is (...)
What do you consider low power respectively ultra low power? What are your additional requirements for the clock signal?
Hi all, In low power design I've learned that there're some techniques, and one of them is clock gating. There're global/local clock gating. I know following codes can infer the local one with some proper power compiler directives. always @(posedge clk) ... if(clk_en) (...)
I was trying to implement my chip using the clock gating low power design feature provided in Encounter. Firstly I turned on the clock gating option in RTL compiler. The tool found all registers that are clock gating applicable and synthesized them with gated clock. Then I (...)
Thanks! Also, I read in Wikipedia that there is about 70% lower power consumption in asynchronous designs as compared to synchronous designs -- Could you please explain why ? I can see that there is this notion of switching activity related to power consumption. But how do you make sure that asynchronous (...)
hi , Refer this book 'low power Methodology Mnaual For SoC design ' by Michael keating


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