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Recent content by GaryM

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    High speed power opamp

    Hey guys,,, sorry for bothering again,, Does any1 know where 2 get LH0101 at an affordable price?? Apparently its quite good for inductive loads..want 2 give ir a try but cant spend too much money... Thanks
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    High speed power opamp

    Hey all,, I have decided to use an LM6181. I have almost succeeded but having some slight problems. Has any1 used this opamp for driving inductive loads?? It works fine for frequencies above 50kHz...but there is ringing for frequencies below....Any ideas what could be causing this???? Thanks...
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    High speed power opamp

    Hi,,,ive already tried using an emitter follower. Though it worked in simulation,,,exactly the same thing didnt work on a breadboard...so i opted for a power opamp...Ive had some success with L272 but since its slew rate is only 1v/us and as my application needs a frequency rance of up 2...
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    High speed power opamp

    Hey Tahmid,,, Thanks for the reply...it says obsolete item please call
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    High speed power opamp

    Hello evry1,, I need a power opamp (which can give a current of atlest 200mA) which has a reasonable speed (atleast 10v/us slew rate)and is affordable. I looked at LM6313 and that will suit my application. But I realised that is obsolete. Can any1 suggest any similar one please.. Thanks in...
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    Layout for Double Sided SMD PCB for AD9833 - confirmation

    Re: Layout for Double Sided SMD PCB for AD9833 - confirmatio Hi ... I am doing the same thing as what you did...building an evaluation board for the AD9833. Your board looks gud...Did it work well? Could you give me any suggestions with your experience? Thanks!!!!!
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    Need to build a variable frequency colpitts oscillator

    Ok...i need a frequency range from 10kHz to 100kHz. Whats the best way to do this using a colpitts?
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    Need to build a variable frequency colpitts oscillator

    oh so you cant make a VFO using a colpitts oscillator??
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    Need to build a variable frequency colpitts oscillator

    Hi, Thanks for your suggestion, you said to add a capacitor between the junction of R5/C3 and the junction of C1/Q1/R3. could you explain why and how do i calculate the values of these capacitors? Thanks
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    Need to build a variable frequency colpitts oscillator

    Hey all, I have to build a colpitts variable frequency oscillator circuit and I am having problems with it. Find attached my schematic. I am using one varactor to acheive variable frequency. But the circuit does not oscillate. Can anyone plese tell me whats wrong???
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