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Amplifier Circuits:  Transimpedance
Current to Voltage Converters
Transimpedance Amplifiers:  #'s      A - G        H -L       M - Z
Amplifier -- Main Page  

Last Updated on: Thursday, April 07, 2016 12:59 PM

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Circuits Designed by Dave Johnson, P.E. :
  • 10 Second Ultra Lower Power Oscillator  -  This circuit works much like the classic 555 timer, but draws only about 1.5 microamps from a 3 volt battery. It is highly stable under varying temperature and supply voltages . . . [Circuit by David A. Johnson P.E.,  05/29/00]

  • 10mhz to 20mhz Laser Light Detector  -  This circuit was originally designed to detect laser light pulses for an optical Ethernet communications system. It has good ambient light immunity . . . [Circuit by David Johnson P.E.,  06/14/00]

  • 10Mhz to 20Mhz Light Receiver  -  Light power to volts conversion = APPROX. 15mV per microwatt at 850nM . . . [Circuit by David A. Johnson P.E.,  07/11/06]

  • 1Khz to Over 70Mhz Light Receiver  -  This circuit uses one tiny C-MOS inverter IC to form a modulated light receiver with a very fast response. It is designed around a PIN photo diode that is packaged for use with plastic optical fibers. It can be used as an optical fiber receiver. By using the open end of the optical fiber it can "sniff" out any modulated light signals . . . [Hobby Circuit designed by David Johnson P.E.,  06/11/00]

  • 1us Light Pulse Receiver  -  This circuit is designed to detect very weak light pulses lasting 1uS. It uses a tuned LC feedback network to provide high sensitivity while giving high ambient light immunity. A post voltage Amplifier is included with a gain of about X20 . . . [Hobby Circuit designed by Dave Johnson P.E.,  03/11/99]

  • 1uS Light Pulse Receiver + Post Amp  -  This circuit is designed to detect very weak light pulses lasting 1uS. It uses a tuned LC feedback network to provide high sensitivity while giving high ambient light immunity. A post voltage Amplifier is included with a gain of about X20. The circuit is described in more detail in the receiver section of my Handbook of Optical Through the Air Communications.  Note: The LF357 op Amp is no longer available, this circuit is for reference only. . . . [Circuit by David Johnson P.E.,  03/11/99]

  • 2Mhz Broad Band Optical Fiber Receiver  -  If you need more sensitivity than the above circuit this circuit provides about ten times more gain. It too is designed around an inexpensive plastic optical fiber detector . . . [Hobby Circuit designed by David Johnson P.E.,  06/09/00]

  • 40Khz Laser Burst Detector  -  This circuit was originally designed to detect weak flashed of laser light bounced off of a fabric video projection screen. It was used as part of a firearm training system. It generates a 100mS output pulse whenever it detects a 3ms to 5ms-laser burst, . . . [Circuit by David Johnson P.E.,  06/13/00]

  • 40KHz Light Receiver Front-End Circuit  -  This circuit uses a unique cascode Amplifier circuit to convert the current from a PIN photo diode to a current without any feedback network. It is very stable and very sensitive. This hobby circuit shown has the potential for a conversion factor of 10 volts per microwatt at 900nm. I included a simple JFET post-amplifier with a gain of about 20. . . . [Circuit by David Johnson P.E.,  06/14/00]

  • 40KHz Modulated Light Detector  -  If you want even more sensitivity than the above circuit, try this design. When used with a one centimeter square photodiode, you can achieve a range of several hundred feet with a standard TV or VCR remote control module . . . [Circuit by David A. Johnson P.E.,  03/12/99]

  • 50Mhz Broad Band Optical Fiber Receiver Version A  -  If the above circuit it still too slow, you can try this circuit. What it lacks in sensitivity it makes up for in speed. The circuit attaches a plastic fiber optic PIN photodiode assembly to a small box containing a small 3v battery and a standard . . . [Circuit by David A. Johnson P.E.,  06/04/00]

  • 5Mhz Broad Band  Optical Fiber Receiver  -  This circuit is a simple broad band light detector that uses a very inexpensive IC and a PIN photodiode that is packaged for use with plastic optical fibers. It has a bandwidth from 1KHz to over 5MHz.  It is great for experimenting with various modulated . . . [Circuit by David A. Johnson P.E.,  06/04/00]


Links to electronic circuits, electronic schematics, designs for engineers, hobbyists, students & inventors:

+/-1.0V Current-to-Voltage Converters -  This current to voltage converter rely on the very high input impedance of the operational Amplifier.  The input current (I) is forced through feedbackCircuit Ideas for Designers App Note - .… [Circuit Ideas for Designers App Note - .]

 

+/-2.5V Current-to-Voltage Converters -  Circuit Ideas for Designers App Note - … [Advanced Linear Devices, Inc]

 

10 Second Ultra Lower Power Oscillator -  This circuit works much like the classic 555 timer, but draws only about 1.5 microamps from a 3 volt battery. It is highly stable under varying temperature and supply voltages . . . [Circuit by David A. Johnson P.E.,  05/29/00]

 

10mhz to 20mhz Laser Light Detector -  This circuit was originally designed to detect laser light pulses for an optical Ethernet communications system. It has good ambient light immunity . . . [Circuit by David Johnson P.E.,  06/14/00]

 

10Mhz to 20Mhz Light Receiver -  Light power to volts conversion = APPROX. 15mV per microwatt at 850nM . . . [Circuit by David A. Johnson P.E.,  07/11/06]

1Khz to Over 70Mhz Light Receiver -  This circuit uses one tiny C-MOS inverter IC to form a modulated light receiver with a very fast response. It is designed around a PIN photo diode that is packaged for use with plastic optical fibers. It can be used as an optical fiber receiver. By using the open end of the optical fiber it can "sniff" out any modulated light signals . . . [Hobby Circuit designed by David Johnson P.E.,  06/11/00]

 

1us Light Pulse Receiver -  This circuit is designed to detect very weak light pulses lasting 1uS. It uses a tuned LC feedback network to provide high sensitivity while giving high ambient light immunity. A post voltage Amplifier is included with a gain of about X20 . . . [Hobby Circuit designed by Dave Johnson P.E.,  03/11/99]

 

1uS Light Pulse Receiver + Post Amp -  This circuit is designed to detect very weak light pulses lasting 1uS. It uses a tuned LC feedback network to provide high sensitivity while giving high ambient light immunity. A post voltage Amplifier is included with a gain of about X20. The circuit is described in more detail in the receiver section of my Handbook of Optical Through the Air Communications.  Note: The LF357 op Amp is no longer available, this circuit is for reference only. . . . [Circuit by David Johnson P.E.,  03/11/99]

 

2 ICs form F/V converter -  04/11/13  EDN Design Idea   Using only six components, you can configure a circuit whose output voltage is proportional to its input frequency. . . .  [by Peter Winship, University of California, Berkeley]

 

2Mhz Broad Band Optical Fiber Receiver -  If you need more sensitivity than the above circuit this circuit provides about ten times more gain. It too is designed around an inexpensive plastic optical fiber detector . . . [Hobby Circuit designed by David Johnson P.E.,  06/09/00]

 

40Khz Laser Burst Detector -  This circuit was originally designed to detect weak flashed of laser light bounced off of a fabric video projection screen. It was used as part of a firearm training system. It generates a 100mS output pulse whenever it detects a 3ms to 5ms-laser burst, . . . [Circuit by David Johnson P.E.,  06/13/00]

 

40KHz Light Receiver Front-End Circuit -  This circuit uses a unique cascode Amplifier circuit to convert the current from a PIN photo diode to a current without any feedback network. It is very stable and very sensitive. This hobby circuit shown has the potential for a conversion factor of 10 volts per microwatt at 900nm. I included a simple JFET post-amplifier with a gain of about 20. . . . [Circuit by David Johnson P.E.,  06/14/00]

 

40KHz Modulated Light Detector -  If you want even more sensitivity than the above circuit, try this design. When used with a one centimeter square photodiode, you can achieve a range of several hundred feet with a standard TV or VCR remote control module . . . [Circuit by David A. Johnson P.E.,  03/12/99]

 

4-20-mA loop needs no external power source -  09/13/01 EDN Design Idea   The simple circuit in Figure 1 uses a low-current-drain MAX4073H Amplifier to sense the current flowing through a 4- to 20-mA loop. The circuit senses the current through a 1Ω resistor with a fixed gain of 100 and uses no battery… [by Shyam Tiwari, Sensors Private Ltd, Gwalior, India]

 

50Mhz Broad Band Optical Fiber Receiver Version A -  If the above circuit it still too slow, you can try this circuit. What it lacks in sensitivity it makes up for in speed. The circuit attaches a plastic fiber optic PIN photodiode assembly to a small box containing a small 3v battery and a standard . . . [Circuit by David A. Johnson P.E.,  06/04/00]

 

5Mhz Broad Band  Optical Fiber Receiver -  This circuit is a simple broad band light detector that uses a very inexpensive IC and a PIN photodiode that is packaged for use with plastic optical fibers. It has a bandwidth from 1KHz to over 5MHz.  It is great for experimenting with various modulated . . . [Circuit by David A. Johnson P.E.,  06/04/00] 


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Transimpedance Amplifiers:  #'s      A - G        H -L       M - Z


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