|
Impedance Transformer Flags Failed Fuse: 12/17/04 EDN Design Ideas / (added 5/05) Figure 1depicts a circuit that
detects the opening of a miniature circuit breaker or high-rupture-capability fuse in a high-reliability telecommunications power supply. The circuit generates an alarm when a failure changes
the impedance of an electromagnetic sensor. Traditional fault-detection circuits sense the voltage difference developed across an open fuse, leakage current flowing through...... |
|
Line Driver Economically Synthesizes Impedance: 01/06/94 EDN-Design Ideas / (added 6/06) The line-driver circuit
in Fig 1 uses a second op amp to synthesize the output impedance. The conventional line-driver circuit employs a single op amp having a resistor whose resistance is equal to the desired
impedance in series with the op amp's output. The principal drawback of the conventional circuit is that the single op amp must deliver twice the needed output voltage because of the large
voltage drop across the output resistor. The circuit in Fig 1is similar to the famous Howland current pump but has different resistor values. To calculate the output resistance, RO, short the
input to ground. Then.... |
|
Low Offset Summing Amplifier: Circuit Ideas for Designers Application Notes Advanced Linear Devices, Inc. (app
note added 63/06) |
|
Low Voltage High Input Impedance Precision DC Summing Amplifier: Circuit Ideas for Designers Application Notes
Advanced Linear Devices, Inc. (app note added 6/06) |
|
Measuring Characteristic Impedance of Short Rambus Motherboard Traces and Small-Outline RIMMs: Agilent Application
Note (added 6/06) |
|
Op Amp Output Impedance - App Note 10: Apex Microtechnology Corp App Note (added 6/06) |
|
Variable Amplifier Impedance: idea of being able to vary the output impedance of a power amplifier (added 6/06) |
|
Impedance Transformer Flags Failed Fuse: 12/17/04 EDN Design Ideas / (electronic circuit added 5/05)
Figure 1depicts a circuit that detects the opening of a miniature circuit breaker or high-rupture-capability fuse in a high-reliability telecommunications power supply. The circuit generates
an alarm when a failure changes the impedance of an electromagnetic sensor. Traditional fault-detection circuits sense the voltage difference developed across an open fuse, leakage current
flowing through...... |
|
Line Driver Economically Synthesizes Impedance: 01/06/94 EDN-Design Ideas / (Circuit / schematic design added 6/06)
The line-driver circuit in Fig 1 uses a second op amp to synthesize the output impedance. The conventional line-driver circuit employs a single op amp having a resistor whose resistance is
equal to the desired impedance in series with the op amp's output. The principal drawback of the conventional circuit is that the single op amp must deliver twice the needed output voltage
because of the large voltage drop across the output resistor. The circuit in Fig 1is similar to the famous Howland current pump but has different resistor values. To calculate the output
resistance, RO, short the input to ground. Then.... |
|
Low Offset Summing Amplifier: Circuit Ideas for Designers - Application Notes - Advanced Linear Devices, Inc. (app
note added 6/06) |
|
Low Voltage High Input Impedance Precision DC Summing Amplifier: Circuit Ideas for Designers - Application Notes - Advanced
Linear Devices, Inc. (app note added 6/06) |
|
Measuring Characteristic Impedance of Short Rambus Motherboard Traces and Small-Outline RIMMs: Agilent Application Note
(app note added 6/06) |
|
Op Amp Output Impedance - App Note 10: Apex Microtechnology Corp - Application Note - (app note added 6/06) |
|
Variable Amplifier Impedance: idea of being able to vary the output impedance of a power amplifier (app note added 6/06) |
