AD8015 - transimpedance amplifier oscillating

Started by Anonymous in sci.electronics.design13 years ago 6 replies

I'm building a optical comm. circuit using an AD8015 transimpedance amplifier from Analog Devices....

I'm building a optical comm. circuit using an AD8015 transimpedance amplifier from Analog Devices. Datasheet: http://www.analog.com/UploadedFiles/Data_Sheets/AD8015.pdf Here is the circuit I'm using: http://gallamine.com/photodiode_tia_schematic.pdf I'm having trouble with the circuit producing a strong ~1.9MHz oscillation. This is independent of what the circuit is hooked to. I have trie...


I made a new kind of lock in amplifier

Started by ChesterW in sci.electronics.design2 years ago 19 replies

I made a new kind of lock in amplifier. I used it to multiplex multiple on-off modulated LED sources using spread spectrum codes. I drove the...

I made a new kind of lock in amplifier. I used it to multiplex multiple on-off modulated LED sources using spread spectrum codes. I drove the LEDs using current sources and switched each on and off using separate codes. This allows the receiver to determine the contribution to signal intensity from each LED. The link shows a pic of received intensity when using only two LEDs. The ma...


Need schematic for a 100 megawatt audio amplifier

Started by Anonymous in sci.electronics.design2 years ago 77 replies

Need schematic for a 100 megawatt audio amplifier using vacuum tubes.

Need schematic for a 100 megawatt audio amplifier using vacuum tubes.


Troubleshooting differential amplifier fault. Advice needed.

Started by John Aston in sci.electronics.design6 years ago 13 replies

I have a device which I'm about to open up and troubleshoot. It's a Hall Effect sensor powered from a +15V/-15V supply. The Hall voltage= is...

I have a device which I'm about to open up and troubleshoot. It's a Hall Effect sensor powered from a +15V/-15V supply. The Hall voltage= is sensed by a differential amplifier input. The differential voltage is a= mplified linearly. The full scale output is +/-10V. The problem is this: When I use a linear power supply to provide the +15V/-= 15V supply, the sensor functions normally. But ...


Separating high pass and low pass TIA output bands.

Started by Artist in sci.electronics.design3 years ago 45 replies

I have an assignment to design a transimpedance amplifier for a photodiode. The bandwidth is to be 40MHz, and there are to be two outputs, a...

I have an assignment to design a transimpedance amplifier for a photodiode. The bandwidth is to be 40MHz, and there are to be two outputs, a high pass output above 20kHz and a low pass output below 20kHz all the way to DC. It is permissible that the two bands overlap a little bit. The noise performance of an amplifier is primarily determined by the noise in the first stage where it is...


Question regarding class F amplifier efficiency

Started by amal banerjee in sci.electronics.design7 months ago

Could some electronics guru here please provide some hints. I am SPICE simulating a class F amplifier with 3, 5 and 7 harmonic tuning and an...

Could some electronics guru here please provide some hints. I am SPICE simulating a class F amplifier with 3, 5 and 7 harmonic tuning and an operating frequency of 500 MHz. I am using VFR92A as the transistor and measuring efficiency. The RMS output power is computed as : RMS output voltage x RMS output current across a resistor. The input DC power is measured as: RMS input DC current x...


What is the major difference between single supply and dual supply circuit for signal conditioning?

Started by Myauk in sci.electronics.design9 years ago 7 replies

Dear All, Currently, I am working on an amplifier design concept selection which will amplify thermocouple output signal 80uV/degree Celsius....

Dear All, Currently, I am working on an amplifier design concept selection which will amplify thermocouple output signal 80uV/degree Celsius. I have found many instrumentation amplifier circuit design using single supply as well as dual dual supplies. If there is anyone who has good experience on this, may I ask what is the primary advantage of using a dual supply signal conditioning circu...


RF power amplifier for Nuclear Quadrupole Resonance (NQR) spectrometer

Started by BioPhysics2016 in sci.electronics.design4 years ago 13 replies

Hello, I'm building Nuclear Quadrupole Resonance (NQR)to test for 14N. using the SpinCore Radio processor USB board. Here is the manual of the...

Hello, I'm building Nuclear Quadrupole Resonance (NQR)to test for 14N. using the SpinCore Radio processor USB board. Here is the manual of the board. http://www.spincore.com/CD/RadioProcessor/RadioProcessor_manual.pdf I could not find low-cost 50/100/200 Watts RF power amplifiers(0.25 - 10 MHz). I have just found the following RF power amplifiers: 1- ENI 325LA RF Power Amplifier, 250...


Re: Why Adding a Voltage Amplifier after a Transimpedance Amplifier reduce BW? Book Claim by 0.64

Started by Felipe Jimenez in sci.electronics.design5 years ago

On Thursday, May 14, 2015 at 10:18:10 AM UTC-7, Phil Hobbs wrote: > On 05/14/2015 01:12 PM, Phil Hobbs wrote: > > On 05/14/2015 01:04 PM,...

On Thursday, May 14, 2015 at 10:18:10 AM UTC-7, Phil Hobbs wrote: > On 05/14/2015 01:12 PM, Phil Hobbs wrote: > > On 05/14/2015 01:04 PM, Felipe Jimenez wrote: > > > On Thursday, May 14, 2015 at 9:28:05 AM UTC-7, John Larkin wrote: > > > > On Thu, 14 May 2015 09:15:53 -0700 (PDT), George Herold > > > > wrote: > > > > > > > > > On Thursday, May 14, 2015 at 11:57:36 AM UTC-4, Ph


DC to 25Hz Isolated amplifier - 10KV Dielectric strenght

Started by Anonymous in sci.electronics.design6 years ago 38 replies

Hi all, I have to build an iso amplifier with several KV dielectric strenght. DC(i.e 0hz) is mandatory. Please guys take a look at the...

Hi all, I have to build an iso amplifier with several KV dielectric strenght. DC(i.e 0hz) is mandatory. Please guys take a look at the schematic here down and be kind to comment it if you have time for. (Spice sim could take a long time ...) Version 4 SHEET 1 2044 820 WIRE -272 -368 -368 -368 WIRE -176 -368 -208 -368 WIRE -368 -272 -368 -368 WIRE -368 -272 -672 -272 WIRE -288 -2


Re: Why Adding a Voltage Amplifier after a Transimpedance Amplifier reduce BW? Book Claim by 0.64

Started by Baron in sci.electronics.design5 years ago

Felipe Jimenez prodded the keyboard with: > On Thursday, May 14, 2015 at 10:18:10 AM UTC-7, Phil Hobbs wrote: > > On 05/14/2015 01:12 PM,...

Felipe Jimenez prodded the keyboard with: > On Thursday, May 14, 2015 at 10:18:10 AM UTC-7, Phil Hobbs wrote: > > On 05/14/2015 01:12 PM, Phil Hobbs wrote: > > > On 05/14/2015 01:04 PM, Felipe Jimenez wrote: > > > > On Thursday, May 14, 2015 at 9:28:05 AM UTC-7, John Larkin > > > > wrote: > > > > > On Thu, 14 May 2015 09:15:53 -0700 (PDT), George Herold > > > > > wrote: > > > >


Re: Why Adding a Voltage Amplifier after a Transimpedance Amplifier reduce BW? Book Claim by 0.64

Started by Phil Hobbs in sci.electronics.design5 years ago

On 05/14/2015 01:12 PM, Phil Hobbs wrote: > On 05/14/2015 01:04 PM, Felipe Jimenez wrote: > > On Thursday, May 14, 2015 at 9:28:05 AM UTC-7,...

On 05/14/2015 01:12 PM, Phil Hobbs wrote: > On 05/14/2015 01:04 PM, Felipe Jimenez wrote: > > On Thursday, May 14, 2015 at 9:28:05 AM UTC-7, John Larkin wrote: > > > On Thu, 14 May 2015 09:15:53 -0700 (PDT), George Herold > > > wrote: > > > > > > > On Thursday, May 14, 2015 at 11:57:36 AM UTC-4, Phil Hobbs > > > > wrote: > > > > > On 05/14/2015 11:50 AM, John Larkin wrote: > > > > > > O


Re: Why Adding a Voltage Amplifier after a Transimpedance Amplifier reduce BW? Book Claim by 0.64

Started by Phil Hobbs in sci.electronics.design5 years ago

On 5/14/2015 1:48 PM, Felipe Jimenez wrote: > On Thursday, May 14, 2015 at 10:18:10 AM UTC-7, Phil Hobbs wrote: > > On 05/14/2015 01:12 PM,...

On 5/14/2015 1:48 PM, Felipe Jimenez wrote: > On Thursday, May 14, 2015 at 10:18:10 AM UTC-7, Phil Hobbs wrote: > > On 05/14/2015 01:12 PM, Phil Hobbs wrote: > > > On 05/14/2015 01:04 PM, Felipe Jimenez wrote: > > > > On Thursday, May 14, 2015 at 9:28:05 AM UTC-7, John Larkin > > > > wrote: > > > > > On Thu, 14 May 2015 09:15:53 -0700 (PDT), George Herold > > > > > wrote: > > > > > > > >


Using a small portable solid state amplifier to trace an audio circuit???

Started by Anonymous in sci.electronics.design4 years ago 6 replies

I have a small portable solid state amplifier that can run off batteries or a wall wart. (12V). I want to trace the circuits in a solid state...

I have a small portable solid state amplifier that can run off batteries or a wall wart. (12V). I want to trace the circuits in a solid state Hammond Organ. (To listen for audio signals). So, this amp is ready to go. Has a speaker and a wall wart connected. I could also use some powered computer speakers too..... My question is this: To trace this organ (or any other audio sign...


Re: Why Adding a Voltage Amplifier after a Transimpedance Amplifier reduce BW? Book Claim by 0.64

Started by Lasse Langwadt Christensen in sci.electronics.design5 years ago

Den torsdag den 14. maj 2015 kl. 19.48.08 UTC+2 skrev Felipe Jimenez: > On Thursday, May 14, 2015 at 10:18:10 AM UTC-7, Phil Hobbs wrote: > > ...

Den torsdag den 14. maj 2015 kl. 19.48.08 UTC+2 skrev Felipe Jimenez: > On Thursday, May 14, 2015 at 10:18:10 AM UTC-7, Phil Hobbs wrote: > > On 05/14/2015 01:12 PM, Phil Hobbs wrote: > > > On 05/14/2015 01:04 PM, Felipe Jimenez wrote: > > > > On Thursday, May 14, 2015 at 9:28:05 AM UTC-7, John Larkin wrote: > > > > > On Thu, 14 May 2015 09:15:53 -0700 (PDT), George Herold > > > > >


Darlington pair is two stage current amplifier

Started by Patrick Chung in sci.electronics.design7 years ago 1 reply

Darlington pair is actually two stage current amplifier. Now, there is new...

Darlington pair is actually two stage current amplifier. Now, there is new tutorial: http://www.cirvirlab.com/index.php/tutorials/107-darlington-pair-or-darlington-transistor-simula tion.html and new online simulation: http://www.cirvirlab.com/simulation/darlington_pair_or_darlington_transistor_online.php


Re: Why Adding a Voltage Amplifier after a Transimpedance Amplifier reduce BW? Book Claim by 0.64

Started by Felipe Jimenez in sci.electronics.design5 years ago

On Thursday, May 14, 2015 at 9:28:05 AM UTC-7, John Larkin wrote: > On Thu, 14 May 2015 09:15:53 -0700 (PDT), George Herold > wrote: > ...

On Thursday, May 14, 2015 at 9:28:05 AM UTC-7, John Larkin wrote: > On Thu, 14 May 2015 09:15:53 -0700 (PDT), George Herold > wrote: > > > On Thursday, May 14, 2015 at 11:57:36 AM UTC-4, Phil Hobbs wrote: > > > On 05/14/2015 11:50 AM, John Larkin wrote: > > > > On Thu, 14 May 2015 04:07:59 -0700 (PDT), Phil Hobbs > > > > wrote: > > > > > > > > > > O


Re: Why Adding a Voltage Amplifier after a Transimpedance Amplifier reduce BW? Book Claim by 0.64

Started by George Herold in sci.electronics.design5 years ago

On Thursday, May 14, 2015 at 12:28:05 PM UTC-4, John Larkin wrote: > On Thu, 14 May 2015 09:15:53 -0700 (PDT), George Herold > wrote: > ...

On Thursday, May 14, 2015 at 12:28:05 PM UTC-4, John Larkin wrote: > On Thu, 14 May 2015 09:15:53 -0700 (PDT), George Herold > wrote: > > > On Thursday, May 14, 2015 at 11:57:36 AM UTC-4, Phil Hobbs wrote: > > > On 05/14/2015 11:50 AM, John Larkin wrote: > > > > On Thu, 14 May 2015 04:07:59 -0700 (PDT), Phil Hobbs > > > > wrote: > > > > > > > > > > Oh


Re: Why Adding a Voltage Amplifier after a Transimpedance Amplifier reduce BW? Book Claim by 0.64

Started by Phil Hobbs in sci.electronics.design5 years ago

On 05/14/2015 01:04 PM, Felipe Jimenez wrote: > On Thursday, May 14, 2015 at 9:28:05 AM UTC-7, John Larkin wrote: > > On Thu, 14 May 2015...

On 05/14/2015 01:04 PM, Felipe Jimenez wrote: > On Thursday, May 14, 2015 at 9:28:05 AM UTC-7, John Larkin wrote: > > On Thu, 14 May 2015 09:15:53 -0700 (PDT), George Herold > > wrote: > > > > > On Thursday, May 14, 2015 at 11:57:36 AM UTC-4, Phil Hobbs > > > wrote: > > > > On 05/14/2015 11:50 AM, John Larkin wrote: > > > > > On Thu, 14 May 2015 04:07:59 -0700 (PDT), Phil Hobbs


Re: Why Adding a Voltage Amplifier after a Transimpedance Amplifier reduce BW? Book Claim by 0.64

Started by John Larkin in sci.electronics.design5 years ago

On Thu, 14 May 2015 10:04:27 -0700 (PDT), Felipe Jimenez wrote: > On Thursday, May 14, 2015 at 9:28:05 AM UTC-7, John Larkin wrote: > > ...

On Thu, 14 May 2015 10:04:27 -0700 (PDT), Felipe Jimenez wrote: > On Thursday, May 14, 2015 at 9:28:05 AM UTC-7, John Larkin wrote: > > On Thu, 14 May 2015 09:15:53 -0700 (PDT), George Herold > > wrote: > > > > > On Thursday, May 14, 2015 at 11:57:36 AM UTC-4, Phil Hobbs wrote: > > > > On 05/14/2015 11:50 AM, John Larkin wrote: > > > > > On Thu