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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
power consumed is higher only when a register changes state. So if you have a large design that doesnt do a lot at a low clock frequency it will probably use a lot less power than a very small design running at a high clock frequency with a high % of change.
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 .
Hi All, What special should be done for low power Synthesis? Thank you!
Hi ranger01, Thanks for your updates. Also I have seen in one of the site concepts on clock gating cells, clock-Gating Concepts: Figure 1 shows two circuits – one with and one without clock gating. A synchronized enable condition allows the register bank to receive either new data from D_IN, or recycled data, (...)
what are the recent trends in low power vlsi cmos design ?
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 (...)
Hi everybody, Is there any IC (or something) that generates ultra low-power clock signal (less than 10MHz) ? I mean it consumes very little power and generates a clock signal. Are crystal based clock generators considered low-power? Thank you
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, My research is about low power design techniques. -> Is it possible to use clock gating for DMA (asyn) ? -> Other possible techniques besides clock gating ? (Preferably architecture/RTL) -> Where can I obtain other testcase ? (> 10k gates + sync design) Please advice. Advance (...)