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| Title | Author | Views/Replies | Posted at |
 Let's talk about PLL's parameter set.Suppose PLL's bandwidth 1Meg. Division of feedback divider is from 30 to 80. How shall I set the other parameter such as Ip, Kvco, R, C1, C2? As we know, there are many trade-off among them. How to de... |
ct731 | 4/6 | 2008/8/27 00:48 |
| Pls clarify basic terms about ADC Hi, In ADC design, we often heard about Precision/Accuracy,Resolution/Linearity |
addxjyx | 4/2 | 2008/8/27 01:43 |
| Group delay in Hspice Hi all How to measure the group delay in hspice.. I wanna reference syntax.. |
knoxville | 5/2 | 2008/8/26 23:49 |
| Problem about hspice simulation Dear all: Who can tell me how to save all the nodes's volatage in the circuit at one specified time when do the tran simulation? For example,i do a tran analysis,".tran 2n 1u "then ... |
booksir | 4/5 | 2008/8/27 01:22 |
| Question about bandgap stability Hi, all I don't know how to simulate whether the bandgap circuit is stable. I use such a way as the figure. I use a small step signal V. Then I run transient to see whether the output is stable. Does... |
addxjyx | 5/14 | 2008/8/27 00:59 |
| IIR and FIR in analog filter? Hi all, I have a quesiton that we know we can implement IIR or FIR filter in digital filter, but in analog filter, why we don't have this division? And, May we use SC filter to implement the IIR or... |
wy830115 | 4/3 | 2008/8/27 01:32 |
| Optocoupler driving a relay Please, Can I use a 4N35 to drive a 6V relay directly, or I will need to use another transistor to make an interface ? Tkx |
ct731 | 6/7 | 2008/8/27 00:54 |
| voltage controlled cap Does anyone know how to add a voltage-controlled cap in Cadence IC? I found a vccap model in analogLIb, but it can be only used in HspiceS. I want to use spectre simulator. Do I need to use Verilog-A ... |
mxg330 | 4/10 | 2008/8/26 23:48 |
| CMFB Hope someone can help. Designing an differential amplifier. I dont really understand the problem that necessitate the use of CMFB circuit and what problem will arrise without the CMFB circuit. Does... |
nnxd | 9/6 | 2008/8/27 01:51 |
| 220V to 12V switcher Hi Can anyone tell me wich chip should I use for isolated 220v to 12v switching power supply. (20-40w autput power) |
yvling | 4/3 | 2008/8/27 00:08 |
| QAM modulator elslalamo alikom all i want a QAM modulator and demodulator circuit that can work in range of 1G or higher i need the circuit easy to be made and tested |
hualeyan | 4/1 | 2008/8/26 23:56 |
| Op-Amp as a current amplifier How the Op-Amp can be designed as a current Amplifier? For ex. i have an Op-Amp OP213 whose max short circuit current Isc=30mA. If I want to draw 300mA from this Op-Amp, what sort of configuration ... |
spacebac | 3/2 | 2008/8/27 01:18 |
| How to compensate DC-DC voltage mode control? I'm using the lm3524 and I want to know if it necessary to compensate, and witch is the better way to compensate the feedback control. I read about single-pole, zero-pole pair and two-pole-two-zero co... |
lassa | 4/5 | 2008/8/27 01:39 |
| how to generate 4phase clock Hi, guys, How to generate 4phase clock. don't use PLL, DLL. And how to generate a clock whose frequency is twice of input clock and duty cycle ia also 50%? Thank you. |
wy830115 | 6/4 | 2008/8/26 23:57 |
| XR8038 a costly mistake I recently bought a an XR8038 sinal generator chip. In my enthusiasm to get it running I over-looked the Max current rating of 20mA and applied a plug in the wall 9V 200mA supply. Needless to say it w... |
yvling | 5/3 | 2008/8/27 01:17 |
| Sample and Hold Circuit Suppose all switches are closed during power down mode. What is the problem with this circuit? Also there is still input signal which is going into another circuitry. Thanks |
booksir | 5/8 | 2008/8/27 01:45 |
| A question about this cmfb circuit Hi, all: please look at this cmfb circuit which was introduced in the book writed by Paul R. Gray, in this circuit, Gray said that "After Voc becames constant, C1 does not transfer charge onto C2 when... |
wy830115 | 4/7 | 2008/8/27 01:13 |
| Can anyone recommend a comparator circuit used for SAR ADC? I want to design a comparator used in a SAR ADC. The SAR ADC is 8bits 50k/s ,under 3.3v power supply, 0.18um process. Can anyone recommend a comparator circuit ? Thanks a lot. 1.which topology ... |
dongyea | 5/4 | 2008/8/27 01:18 |
| FM strength Measurement?? I want to build a simple strength meter which can measure the signal strength of FM stations in my city(different places in the city) for project, which is in a week. So, please help me with t... |
zunwang | 4/4 | 2008/8/27 01:26 |
| replacement for ICL8038 hello members i wish to know the replacement ic for icl8038, can any one suggest it please thanks in advance with best regards pratap |
fusarium | 6/1 | 2008/8/27 00:11 |
| I want to ask a question Hi, all, My teacher tell me that when design RF, we must think about the channel module effect, because the frequency is high. I don't know how to understand this word. |
ybyygu | 4/5 | 2008/8/27 01:30 |
| can i get a 128 x 64 DOT matrix display circuit design, can i get a 128 x 64 DOT matrix display circuit design, |
rickli | 5/2 | 2008/8/27 00:08 |
| crystal osc. what is the difference between quartz crystal and oscillator? |
lassa | 14/5 | 2008/8/27 01:40 |
| Help on Pspice Simulation on IGBT Switching Characteristics Hello everyone, Currently I am studying the switching characteristics of IGBT using Pspice simulation. I downloaded the spice model from manufacturer's website (for example, Infineon and Internati... |
z315 | 5/3 | 2008/8/27 00:30 |
| Start up time of class-d audio amplifer Hi, I found many datasheets of class-d audio amplifier used in the PDA or mobile phone gives the startup time of 1ms or 9ms etc... Would anyone pls. tell me what role does this time play in system r... |
naoge | 5/2 | 2008/8/27 00:05 |
| A question about bandgap reference,please help me. I designed a bandgap reference circuit,as is shown in the attached picture.The circuit is based on the amplifier feedback to build reference voltage.In ac simulation,it's loop gain and phase margin i... |
ken7976 | 4/9 | 2008/8/27 00:21 |
| about GBP Dear all: I see the data sheet, OP Gain Bandwidth product is 140Mhz, Unit gain bandwidth is 40Mhz. In my concept Gain bandwidth product should be equal to Unit... |
btcdtc | 7/5 | 2008/8/27 00:21 |
| Looking for a simple SLA charger for alarm system HI, I am looking for a simple SLA charger for alarm system. It is for 12V 1.2Ah Sla battery, when the mains in missing, the battery feeds the alarm circuit. |
edu | 4/4 | 2008/8/27 01:44 |
| LM317 boosting problem I want to boost the current of LM317 or other regulator IC. I have gone through data sheet of it and found the info over there but not much useful for me then i got other ckt digram too but it is u... |
wyslnhhh56 | 6/6 | 2008/8/27 01:14 |
| transfer function of oscillator (RC, LC, Ring etc.) Can somebody point me to a source that'll show how to calculate open loop transfer function of oscillators (LC, RC, Ring etc.). thanks. |
hualeyan | 5/3 | 2008/8/27 01:44 |
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