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• CMOS Logic Inverter Amplifier Characteristics
  This chart shows some of the measured characteristics of three different unbuffered CMOS logic gates, used as voltage amplifiers.  (added 12/04)

• ELECTRIC FIELD DISTURBANCE MONITOR
  This schematic is the power supply and front-end sections of the field monitor that is discussed in more detail at Electric Field Disturbance Monitor. The system can detect human and animal motion by the electric fields they disturb.

ADF7020 RF Port Impedance Values for Matching Purposes:    AN-764-Analog Device Application Notes  (app note added 6/06) 

Agilent TS-5400 Series II Automotive Electronics Functional Test System:    Agilent Application Note   (added 6/06)

Amplifying High-Impedence Sensors: Photodiode Example:    Microchip Application Note Published 8-Oct-04   (app note added 2/06)

AN-10-004  Diminutive Impedance-Matching Splitters:    Application Note MiniCircuits.com  (app note added 6/07)

AN-70-001  Fixed attenuators help minimize impedance mismatches:    Application Note MiniCircuits.com  (app note added 6/07)

AN-764: ADF7020 RF Port Impedance Values for Matching Purposes :    AN-764-Analog Device Application Notes  (app note added 6/06) 

AN951: Amplifying High-Impedence Sensors: Photodiode Example:    Microchip Application Note Published 8-Oct-04   (app note added 2/06)

App Note 10 - Op Amp Output Impedance:    Apex Microtechnology Corp App Note (added 6/06)

Audio-test accessory isolates and matches loads:    3/16/06  EDN Design Ideas  /  (added 10/06)  This low-cost, switchable, dual-impedance transformation circuit comprises a single conventional transformer and two minimum-loss pads.

Bipolar current source maintains high output impedance at high frequencies:    12/5/2005  EDN Design Ideas  / (added 05/07)    Use line-receiver/amp ICs to build high-frequency constant-current sources.

Diminutive Impedance-Matching Splitters:    Application Note MiniCircuits.com  (app note added 6/07)

Fast Current Feedback Amplifiers Tame Low Impedance Loads:    DN132  Design Notes (Linear Technology) (app note added 1/06)

Fixed attenuators help minimize impedance mismatches:    AN-70-001  Application Note MiniCircuits.com  (app note added 6/07)

High Input Impedance DC Summing Amplifier:    Circuit Ideas for Designers Application Notes Advanced Linear Devices, Inc.  (app note added 6/06)

High Input Impedance Precision DC Summing Amplifier:    Circuit Ideas for Designers Application Notes Advanced Linear Devices, Inc.  (app note added 6/06)

High Voltage Amplifier Drives Piezo Tubes:    12/07)/2004  EDN-Design Ideas  Piezoelectric tubular positioners that drive manipulators in scanning tunneling microscopes require high-voltage, low-current drive circuits. The circuit in Figure 1 can drive high-resistance, low-capacitance piezoelectric loads at a -3-dB bandwidth of 6 kHz. It offers a low-cost alternative to commercial drivers.  (added 10/05)

High-impedance buffer amplifier's input includes ESD protection:    9/28/2006    EDN Design Ideas  / (added 05/07)    Diodes and guard traces suppress high-voltage static-discharge transients.

High-impedance voltmeter:    An ideal voltmeter has infinite input impedance, meaning that it draws zero current from the circuit under test. This way, there will be no "impact" on the circuit as the voltage is being measured. The more current a voltmeter draws from the circuit under test, the more the measured voltage will "sag" under the loading effect of the meter, like a tire-pressure gauge releasing air out of the tire being measured...(schematic added 6/07)