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Amplifier Circuits:  High Gain Circuits
Amplifier -- Main Page

Last Updated on: Thursday, November 30, 2017 07:37 AM


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Analog-Input serves any microcontroller -  20-Dec-01 EDN-Design Ideas The simple ADC in Figure 1 is perfect for getting analog signals into a purely digital microcontroller.  Using just five surface-mount parts, you can assemble it for less than 50 cents  (1000], which is approximately half the cost of a single-chip-ADC approach in the same volume.  Moreover, this design takes only one pin from the microcontroller to operate __ Circuit Design by Steven Hageman, Agilent Technologies, Santa Rosa, CA

Circuit performs high-speed voltage-to-current, current-to-current conversion -  07/25/02 EDN-Design Ideas The circuit in Figure 1performs active voltage-to-current conversion or acts as a variable-gain current mirror with high precision and bandwidth.  A typical application is testing high-speed ICs or other devices that have inputs designed to be driven from current-steering DACs to enable a modulated voltage source to control the devices __ Circuit Design by Ali Mehmed, Nokia UK Ltd, Southwood, UK

High Gain Amplifier -  In this project a 2-transistor amplifier is built on the first section of the Printed Circuit Board and a touch plate is connected to it so that the LED turns on when the plate is touched. __ Designed by Collin Mitchell

LED Driver Delivers Constant Luminosity -  12-Jun-03 EDN-Design Ideas White-LED driver touts high efficiencyThe circuit in Figure 1 is similar in principle to that of a previous Design Idea(Reference 1] but offers improved,reproducible performance.  The output current is almost constant over an input-voltage range of 1.2 to 1.5V and is insensitive to variations of transistor gain.  Transistors Q1 and Q2 form an astable flip-flop __ Circuit Design by Israel Schleicher, Bakersfield, CA

Low-noise AC Amplifier has digital control of gain & bandwidth -  02/05/04 EDN-Design Ideas In low-noise analog circuits, a high-gain amplifier serves at the input to increase the SNR.  The input signal level determines the input-stage gain; low-level signals require the highest gain.  It is also standard practice in low- __ Circuit Design by Philip Karantzalis, Linear Technology App Note, Milpitas, CA,

Network imitates thermocouples -  11/08/01  EDN-Design Ideas Thermocouples find wIdeaspread use for temperature measurement in systems.  During system design or testing, you must observe the system's response at different temperatures.  However, it's inconvenient to heat a thermocouple every tim __ Circuit Design by Abel Raynus, Armatron International, Melrose, MA

Performs High-Speed Voltage-To-Current, Current-To-Current Conversion -  07/25/02  EDN-Design Ideas The circuit in Figure 1performs active voltage-to-current conversion or acts as a variable-gain current mirror with high precision and bandwidth.  A typical application is testing high-speed ICs or other devices that have inputs des __ Circuit Design by Ali Mehmed, Nokia UK Ltd, Southwood, UK

Positive feedback yields fast Amplifier with precision DC offset -  1-Apr-04 EDN-Design Ideas Some signal-processing applications require a high-speed, low-noise, dc-coupled amplifier that incorporates a precision dc-offset adjustment.  Examples include oscilloscopes, in which the offset adjustment typically acts as a "position" control], ADC-input gain blocks, and scanning-ion-beam-microscopy deflection circuitry __ Circuit Design by Steve Woodward, Chapel Hill, NC

Precise Gain Without External Resistors -  DN348 Design Notes __ Linear Technology/Analog Devices

Programmable-gain Amplifier is low-cost -  01/18/01 EDN-Design Ideas Numerous programmablegain amplifiers are available, but a simple solution provIdeas the option of using 256 gain steps with an 8-bit DAC and higher steps.   PDF has several circuits, scroll down. __ Circuit Design by J Jayapandian, Indira Gandhi Centre for Atomic Research, Kalpakkam, India

Transistor Preamp -  A versatile, High Gain design.  Can be Frequency compensatated for Various applications, including Dynamic Microphones, Tape and Phono Applications.  Shown are Values for a Flat & RIAA response, but many others can be created. __ Designed by G.L. Chemelec

Transmitter Accurately Transfers Voltage Input -  15-May-03 EDN-Design Ideas When you connect remote sensors to a central process controller, a simple, robust, and commonly used interface is the 4- to 20-mA loop.  The advantages of this current loop include the simplicity of just two twisted wires that share both power and signal, the loop's high noise immunity in harsh environments, and the de facto loop standard within the process-control industry __ Circuit Design by Clayton Grantham, National Semiconductor, Tucson, AZ

Very Good Transistor Preamp -  A versatile, High Gain design.  Can be Frequency compensatated for Various applications, including Dynamic Microphones, Tape and Phono Applications.  Shown are Values for a Flat & RIAA response, but many others can be created. __ Designed by G.L. Chemelec

Voltage-To-Current Converter Makes a Flexible Current Reference -  18-Sep-03 EDN-Design Ideas The voltage-to-current converter in Figure 1 can both source and sink current.  The circuit isflexible than some traditional current references that require different topologies for current sourcing and sinking.  Also, you can easily adjust the value of the current reference by simply adjusting the circuit's input voltage __ Circuit Design by Art Kay, Texas Instruments, Tucson, AZ


         Amplifier Circuits:  High Gain Circuits


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