AN-417: Fast Rail-to-Rail Operational Amplifiers Ease Design Constraints in Low Voltage High Speed Systems:  AN-417 Analog Devices Application Notes  (app note added 6/06) Movement towards lower power supply voltages is driven by  demand that systems consume less and less power coupled with  desire to reduce  number of power supply voltages in  system. The following applications are discussed: Single-Ended and Differential Input ADC Input Circuits, Video Line Driver, Active Filter, HDSL Transceiver, and Transformer Drive Circuits.

Bandpass Filter (Single Opamp) :  A band pass filter passes a range of frequencies while rejecting frequencies outside  upper and lower limits of  passband. The range of frequencies to be passed is called  passband and extends from a point below  center frequency to a point above  center frequency where  output voltage falls about 70% of  output voltage at  center frequency. (added 6/06)

Basic Op Amp Theory and Practice - App Note 31:  Apex Microtechnology Corp App Note (added 6/06)

Biasing and Decoupling Op Amps in Single Supply Applications:  AN-581 Analog Devices Application Notes  (app note added 6/06)

Biasing Op-Amps into Class A:  (electronic circuit added 4/05)

Bootstrapped IC Substrate Lowers Distortion in JFET Op Amps:  AN-232 Analog Devices Application Notes  (app note added 6/06)

Bootstrapping Allows Single Rail Op Amp to Provide 0V Output:  02/06/03 EDN Design Ideas  /  (added 12/04)  Many single-supply-powered applications require amplifier-output swings within 1 mV—or even submillivolts—of ground. Amplifier-output-saturation limitations normally preclude such operation. Figure 1's power-supply bootstrapping scheme achieves  desired characteristics with minimal parts count....

Bridging Line Amplifier :  (diagram added 6/03)

Circuit Forms Industrial Grade Digital Potentiometer:  09/20/01 EDN Design Ideas  /  (added 1/05)  Both ac and dc motors in modern industrial systems often receive their control from PLCs (programmable-logic controllers) in a control room safely away from the process. If an operator must manually set the motor speed while observing the process, the component of choice is usually an industrial-grade potentiometer. ...

Circuit Provides Inverting/Noninverting Gain:  11/09/95 EDN-Design Ideas / (added 4/02)  

Circuit Provides Linear I-To-V Conversion:  01/18/96 EDN-Design Ideas / (added11/05) The circuit in Figure 1 provides a 4to 20-mA voltage-to-current conversion for noise-immune data transmission in industrial data-acquisition systems. The circuit supplies two voltages to the inverting input of the control amplifier IC1A. The first voltage, from the follower IC1B, introduces an offset in the transfer function of the circuit. The IC1C-IC1D differential stage produces the second voltage, which is twice the voltage across the current-sensing resistor, RCS. The R1-R1 divider halves and sums the two voltages at the input of IC1A.

CLC730013eb 8-Pin Op Amp Evaluation Boards:  National Semiconductor Application Note   (app note added 2/06)

CLC730024eb Quad Op Amp Evaluation Boards:  National Semiconductor Application Note   (app note added 2/06)

CLC730027eb 8-Pin Op Amp Evaluation Boards:  National Semiconductor Application Note   (app note added 2/06)

CLC730031eb Quad Op Amp Evaluation Boards:  National Semiconductor Application Note   (app note added 2/06)

CLC730036eb 8-Pin Dual Op Amp Evaluation Boards:  National Semiconductor Application Note   (app note added 2/06)

CLC730038eb 8-Pin Dual Op Amp Evaluation Boards:  National Semiconductor Application Note   (app note added 2/06)

CLC730068eb SOT23-5 Op Amp Eval.Board:  National Semiconductor Application Note   (app note added 2/06)

CLC730074eb Triple Op Amp Evaluation Boards:  National Semiconductor Application Note   (app note added 2/06)

CLC730075eb Triple Op Amp Evaluation Boards:  National Semiconductor Application Note   (app note added 2/06)

CLC730077eb 8-Pin Op Amp Evaluation Boards:  National Semiconductor Application Note   (app note added 2/06)

CLC730114eb 8-Pin Lead-Less-Package Dual Op Amp Evaluation Board:  National Semiconductor Application Note   (app note added 2/06)

CLC730121eb: 8-Pin Thermally Enhanced Soic (Psop) Dual Op Amp Evaluation Board:  National Semiconductor Application Note   (app note added 2/06)

CLC730123eb: 8-Pin MSOP Dual Op Amp Evaluation Board:  National Semiconductor Application Note   (app note added 2/06)

CLC730216 Single High Speed Op Amp Evaluation Boards    (SOIC and SOT):  National Semiconductor Application Note   (app note added 2/06)

CLC730227 Single High Speed Op Amp Evaluation Boards    (SOIC and SOT):  National Semiconductor Application Note   (app note added 2/06)

CLC730231 Quad High Speed Soic Op Amp Evaluation Board:  National Semiconductor Application Note   (app note added 2/06)

C-Load Tm Op Amps Conquer Instabilities:  DN107  Design Notes (Linear Technology) (app note added 1/06)

C-Load Tm Op Amps Tame Instabilities:  DN83  Design Notes (Linear Technology) (app note added 1/06)

CMOS Multiplying DACs and Op Amps Combine to Build Programmable Gain Amplifier, Part 1:  AN-320A Analog Devices Application Notes  (app note added 6/06)

CMOS Multiplying DACs and Op Amps Combine to Build Programmable Gain Amplifier, Part 1:  AN-320B Analog Devices Application Notes  (app note added 6/06)

Constant Current Amplifier :  (diagram added 6/03)

Constant Current Power Amplifier :  (diagram added 6/03)

Current Feedback Amplifier Do's and Don'ts:  DN46  Design Notes (Linear Technology) (app note added 1/06)

Current Feedback Amplifiers :  National Semiconductor Application Note 05-Aug-1995 (app note added 4/02)

Current Feedback Op Amp Applications Circuit Guide:  National Semiconductor Application Note   (app note added 2/06)

Current Source Enables Op Amp's Output to Go to Ground:  09/05/04 EDN Design Ideas  /  (added 1/05)  The LM324 is a cost-effective choice for an op amp, especially when you need to apply ground-level inputs. Although its output purportedly includes ground, its poor current-sinking capability limits the applications. At output voltages lower than 0.5V, the op amp's sinking current ranges only from 2 to 100 µA....