AC and op amp provide variable control voltage: 12/06/2001 EDN - Design Ideas / Early DACs contained standard R-2R ladder networks, and produced a negative output voltage. These early DACs, such as the MAX7837/7847 and the MAX523, require both positive and negative supply rails to accommodate their negative output. With the transition to single-supply ICs, however, many modern DACs operate with a single supply rail and an inverted R-2R ladder network. . |
Application Guide for OpAmps: |
Applications of the LM392 Comparator OpAmp IC: National Semiconductor Application Notes, 04-Nov-1995 |
Applying a New Precision OpAmp : National Semiconductor Application Notes,04-Nov-1995 |
Applying Dual & Quad FET OpAmps : National Semiconductor Application Notes,10-May-1996 |
Bootstrapping allows single rail op amp to provide 0V output: 02/06/03 EDN-Design Ideas / 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 the desired characteristics with minimal parts count |
Circuit Provides Inverting / Noninverting Gain: 11/09/95 EDN-Design Ideas |
Circuit Provides Linear Volt to I Conversion: 01/18/96 EDN-Design Ideas |
Current Feedback Amplifiers : National Semiconductor Application Notes,05-Aug-1995 |
DAC & OpAmp Provide Variable Control Voltage: 12/06/01 EDN-Design Ideas / PDF contains multiple circuits - scroll to find this circuit |
DAC and op amp provide variable control voltage: 12/06/01 EDN-Design Ideas / Early DACs contained standard R-2R ladder networks, and produced a negative output voltage. These early DACs, such as the MAX7837/7847 and the MAX523, require both positive and negative supply rails to accommodate their negative output. With t... |
Designing An OpAmp Headphone Amplifier: many circuit examples |
Designing With a New Super Fast Dual Norton Amplifier : National Semiconductor Application Notes,04-Nov-1995 |
Designing With OpAmp: Audio design has for many years relied on a very small number of Op-Amp types. The TL072 and the5532, numbers that will be immediately familiar to anyone involved in audio electronics, have dominated the small-signal scene for many years. There are however other Op-Amps, some of which can be very useful, and a selected range is covered here. |
Digital Quality Microphone Pre Ampl. Using the Model 425 OPAMP |
Feedforward Compensation Speeds OpAmp : National Semiconductor Application Notes,28-Jun-1996 |
IC OpAmp Beats FETs on Input Current : National Semiconductor Application Notes,04-Nov-1995 |
LH0024 & LH0032 High Speed OpAmp Applications : National Semiconductor Application Notes,04-Nov-1995 |
Linear power driver works from single supply: 07/25/2002 EDN - Design Ideas / (added 10/03) In low-power, single-supply analog applications, it is often desirable to maintain precise control of voltages much greater than the positive-supply rail. The circuit in Figure 1 allows you to amplify the input voltage, VIN, by a factor, A, which resistors R1 and R2 set. The output voltage, VOUT, equals AVIN, where A=R2/(R1+R2).. |
LM118 OpAmp Slews 70 Volt / Microsecond : National Semiconductor Application Notes,28-Jun-1996 |
LM3900New Current Differencing Quad of Plus or Minus Input Amplifiers: National Semiconductor Application Notes,04-Nov-1995 |
LM6361 / LM6364 / LM6365 Fast OpAmps: National Semiconductor Application Notes,04-Nov-1995 / Offer High Speed at Low Power Consumption |
Low Distortion Wideband Power OpAmp : National Semiconductor Application Notes,04-Nov-1995 |
Low Noise Precision OpAmp : National Semiconductor Application Notes,28-Jun-1996 |
Main Principles of Amplifier Wiring : How to wire operational amplifier |
MicroPower using the LM4250 Programmable OpAmp : National Semiconductor Application Notes,04-Nov-1995 |
Monolithic OpAmp the Universal Linear Component : National Semiconductor Application Notes,04-Nov-1995 |
Monolithic Power OpAmp : National Semiconductor Application Notes,01-May-1998 |
Negative Resistor Cancels opamp Load: 05/24/01 EDN-Design Ideas / PDF contains multiple circuits - scroll to find this circuit. |
New OpAmp Ideas : National Semiconductor Application Notes,04-Nov-1995 |
Noninverting op amp circuit has simple gain formula: 11/28/2002 EDN - Design Ideas / Basic textbooks describe inverting and noninverting amplifiers based on operational amplifiers. These amplifiers have different gain equations. Whereas in the inverting configuration, the gain is the ratio of the feedback and input resistances, in the noninverting amplifier, the gain ratio has an added term.. |
Op Amp improves Power Supply's Regulation: 06/05/96 EDN-Design Ideas |
Op amp linearizes attenuator control response: 07/25/2002 EDN - Design Ideas / Professional-audio equipment commonly uses Analog Devices' (www.analog.com) high-performance, quad-voltage-controlled SSM2164 attenuator. The control response is -30 dB/V, with 0V producing unity gain. Attenuation increases as the applied control voltage increases in the positive direction. The circuit in Figure 1 extends the range of applications for this versatile chip by providing a simple.... |
Op amp linearizes response of FET VCA: 09/05/2002 EDN - Design Ideas / Fets find common use in VCAs (voltage-controlled amplifiers) and attenuators, in which the FET serves as a variable resistance. A control voltage applied to the gate sets the channel resistance and overall circuit gain. You frequently need to select individual FETs because of wide spreads in FET characteristics.. |
OpAmp Booster Designs : National Semiconductor Application Notes,09-Apr-1996 |
OpAmp Circuit Collection : National Semiconductor Application Notes,04-Nov-1995 |
OpAmp Linearizes Attenuator Control Response: 07/25/02 EDN-Design Ideas / Professional-audio equipment commonly uses Analog Devices (www.analog.com) high-performance, quad-voltage-controlled SSM2164 attenuator. The control response is -30 dB/V, with0V producing unity gain. |
OpAmp Linearizes Response of FET VCA: 09/05/02 EDN-Design Ideas / Fets find common use in VCAs (voltage-controlled amplifiers) and attenuators, in which the FET serves as a variable resistance. A control voltage applied to the gate sets the channel resistance and overall circuit gain. |
OpAmp Makes Precise 9 Volt Battery Splitter: 07/17/97 EDN-Design Ideas / Alkaline 9V batteries are ideal for many portable, handheld applications, this circuit generates a bipolar supply of5V and 2.3 to 4V using a precision5V reference and one op amp as a supply splitter |
PWM Circuit uses one OpAmp: 07/06/00 EDN-Design Ideas / circuit delivers a rectangular signal with duty cycle varying between0 and100% in response to an input signal varying from0 to5V dc |
PDF contains multiple circuits - scroll to find this circuit. |
Oscillator uses current feedback op amp |
Single Polarity Powe Supply Circuit for 400 series Amplifiers |
Topics on using the LM6181New Current Feedback Amplifier : National Semiconductor Application Notes,05-Aug-1995 |
Tutorial on Applying OpAmps to RF Applications : National Semiconductor Application Notes,02-Apr-1999 |
Use the LM158 / LM258 / LM358 Dual, Single Supply OpAmp : National Semiconductor Application Notes,04-Nov-1995 |
Versatile ShiftKeying Generator Uses CurrentFeedback Amplifiers : 06/24/02 Electronic Design - Ideas for Design / Digital information often must travel through analog channels in applications like satellite communication, digital cellular phones, digital microwave communication, and others. This transmission is made possible by the sinusoidal signal-modulation... |
Video multiplexer uses high speed op amps : 08/21/03 EDN-Design Ideas / Video multiplexers route video from several sources to a single channel. Low-end consumer products use CMOS analog switches and multiplexers, such as the 4066 and 4051. Unfortunately, these devices have a series on-resistance that ranges from approximately 100O to 1 kO, a resistance that is not constant with video level and that appears in series with the signal.... |
Wideband OpAmp Capable of MicroPower Operation : National Semiconductor Application Notes,24-Oct-2001 |
Working With High Impedance OpAmps : National Semiconductor Application Notes,04-Nov-1995 |
Amplifier: Operational Circuits
