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Reference Circuits

Reference:
  #'s - O       P - Z


Last Updated: October 24, 2017 02:55 PM


Links to electronic circuits, electronic schematics, designs for engineers, hobbyists, students & inventors:

 

 
 


Links to electronic circuits, electronic schematics, designs for engineers, hobbyists, students & inventors:

Positive Regulator Makes Dual Negative-Output Converter -  06/26/03  EDN Design Ideas:  Some systems, such as optical networks, require than one negative voltage. __ Circuit Design by Keith Szolusha, Linear Technology Corp, Milpitas, CA

Positive regulator makes negative DC/DC converter -  12/26/02 EDN Design Ideas:  Power-supply designers can choose from a plethora of available positive buck regulators that can also serve as negative boost DC/DC converters.  S __ Circuit Design by Keith Szolusha, Linear Technology Corp, Milpitas, CA

Potentiometer Programs & Stabilizes Voltage Reference -  05/30/02 EDN Design Ideas:  The potentiometer portion of a mixed-signal, digitally programmable potentiometer adds variability to an analog circuit, and its controls provide programmability.   __ Circuit Design by Chuck Wojslaw, Catalyst Semiconductor, Sunnyvale, CA - May 30, 2002

Precision reference bans precision resistors -  06/10/99 EDN Design Ideas:  Combining a switched-capacitor charge pump with a precision reference yields an inverted reference from a positive power supply __ Circuit Design by Budge Ing, Maxim Integrated Products, Sunnyvale, CA

Precision voltage reference Delivers 80 mA -  12/01/06 EDN Design Ideas:  Robust, 4.096V reference source packs a punch __ Circuit Design by James Horste and Gary Staiman, Maxim Integrated Products Inc, Sunnyvale, CA

Provide ADSL Frequency Reference -  05/25/00 EDN Design Ideas:  The discrete-multitone (DMT) frequencies that asymmetrical-digital-subscriber lines (ADSL) use are integral multiples of a common frequency, and the symbol period is the inverse of this frequency.  integration over the symbol period allows the sine and cosine orthogonal waveform products to vanish for all multiples of the common frequency except for those having the same frequency.    __ Circuit Design by Bert Erickson, Fayetteville, NY

Provide Reference for Multiple ADCS -  24-Jan-02 EDN Design Ideas:  The achievable accuracy for systems with multiple ADCs depends directly on the reference voltages applied to the ADCs.  Medical-ultrasound-imaging systems, for example, commonly include a large number of ADCs in the system's beam-former electronics, with the ADCs usually organized in groups of 16, 24, 32, and so on __ Circuit Design by Ron Gatzke and Tanja Hofner, Maxim Integrated Products, Sunnyvale, CA

Pushbutton replaces rotary switch -  26-Oct-00 EDN Design Ideas:  The problem of setting any one of four modes of aC-operated process has a straightforward solution  Have the C check the states of some 4 bits of aC.    __ Circuit Design by Abel Raynus, Armatron International Inc, Melrose, MA

RD68HC908LBC : Li-ION Battery Charger Reference Design -  This reference design describes a Li-ion battery charger for one 3.6V Li-ion battery cell by using the low cost 8-pin MC68HC908QT2 MCU.  This reference demo provides reader a reference on how to implement constant current, constant voltage charging method for Li-ion battery and how to in-circuit-programming M68HC908QT/QY MCU in system __ Designed by Freescale

Rearranged reference helps ADC measure its own supply voltage -  28-Apr-05 EDN Design Ideas:  Clever topology allows self-measurement of power supply rail __ Circuit Design by Bjrn Starmark and Orville Buenaventura, Maxim Integrated Products Inc, Sunnyvale, CA, and Sren Kck, Audiovxlar, Sweden

Reduce voltage-reference output noise by half -  3-Feb-05 EDN Design Ideas:  Reducing low-frequency (1/f] noise generated by an IC voltage reference can prove difficult.  in theory, adding a lowpass filter to a reference's output reduces noise.  in practice, a lowpass RC filter for suppression of noise frequencies below 10 Hz requires large values of series resistance and shunt capacitance __ Circuit Design by Alfredo H Saab and Steve Logan, Maxim Integrated Products Inc, Sunnyvale, CA

Reference Design for the TAS5110DAD Digital Audio PWM Power Output Stage -  The true digital audio amplifiers (TDAA) system consists of a PCMPWM modulator device and a PWM power output device.  The PCMPWM processor accepts a serial PCM digital audio stream and converts it to a 3.3 -V PWM audio stream.  The TDAA output stage provides a large-signal PWM output.  The digital PWM__ 

Reference Designs vs. Design Ideas: Related, or not? -  EDN Design Ideas:  07/09/2013    The battle is on.  Which do you prefer, Dis, or manufacturers' reference designs? __ Circuit Design

Reference Designs-Poll conclusions -  07/19/13  EDN Design Ideas:  Our opinions are illuminated, and one or two surprises lurk, in the Reference Design poll results.   __ Circuit Design by Michael Dunn

Reference Divide by 4 -  The LT5400 is a quad resistor network with excellent matching specifications over the entire temperature range.  All four resistors can be accessed and biased independently, making the LT5400 a convenient and versatile choice for any application that can benefit from matched resistors.  These resistor networks provide precise ratiometric stability required in highly accurate difference amplifiers, voltage references and bridge circuits.  __ Linear Technology/Analog Devices App Note, June 23, 2011

Reference Divider with Op Amp Input Bias Current Balancing -  The LT5400 is a quad resistor network with excellent matching specifications over the entire temperature range.  All four resistors can be accessed and biased independently, making the LT5400 a convenient and versatile choice for any application that can benefit from matched resistors.  These resistor networks provide precise ratiometric stability required in highly accurate difference amplifiers, voltage references and bridge circuits.  __ Linear Technology/Analog Devices App Note, June 23, 2011

Reference stabilizes exponential current -  10/25/01 EDN Design Ideas:  in an antilog converter, the difference between the base voltages of two transistors sets the ratio of their collector currents  The use of matched transistors balances the first-order temperature coefficient but leaves a temperature-dependent gain term, q/kT.  Classic antilog circuits use a thermistor in the drive circuitry to correct this temperature dependency __ Circuit Design by Tom Napier, North Wales, PA

Regulator has One Active Part -  03/16/95 EDN Design Ideas:  The regulator of unusual simplicity (ROUS) in Fig 1 derives a low-voltage, low-current output from rectified 115 to 270V ac.  Pass transistor Q1 is the regulator's only active component.    __ Circuit Design by Kennan C Herrick, ESI Electronics Corp San Francisco, CA

Regulator Makes Dual Tracking Reference -  11/07/96 EDN Design Ideas:  You can use the venerable 723 voltage regulator in new and unusual ways.  For example, you can modify its topology as in Figure 1 to yield a low-component-count, dual-polarity tracking voltage reference.  The 723, a long-time standard in power-supply design, is a flexible IC that includes a temperature-compensated voltage reference, an error amplifier,  __ Circuit Design by James Mears, National Semiconductor, Tacoma, WA

Robust 10MHz reference clock input protection & distributor for RF systems -  07/31/14  LTC Design Notes: Design a protected 10MHz reference input without degrading phase noise. __ Circuit Design by LTC Design Note

Simple Circuit Regulator Has One Active Part -  03/16/95 EDN Design Ideas:  The regulator of unusual simplicity (ROUS) in Fig 1 derives a low-voltage, low-current output from rectified 115 to 270V ac.  Pass transistor Q1 is the regulator's only active component.    __ Circuit Design by Kennan C Herrick, ESI Electronics Corp San Francisco, CA

Stereo-amplifier IC's outputs drive multiple loads -  11/21/05  EDN Design Ideas:  Reference provide as constant bias voltage regardless of supply-voltage variations __ Circuit Design by Jean-Jacques Avenel, Maxim Integrated Products, Lesigny, France

Supply Delivers Pin-Programmable Multiple References -  1-May-03 EDN Design Ideas:  in the circuit of Figure 1, the REF01, IC 1, is a buried-zener-diode-based, precision 10V reference that features minimal noise and drift over temperature.  The circuit provide as not only the 10V output of the REF01, but also a 5V output that a REF02 reference would deliver.  in addition, the circuit provide as -5V, -10V, and an unbalanced dual reference, the sum of whose voltages is precisely 10V __ Circuit Design by V Manoharan, Kochi, India

Supply Savess From Lax Predecessor -  11/23/94 EDN Design Ideas:  The lab supply in Fig 1 automatically sets its output voltage to zero whenever you switch it on.  Thus, the lab supply can't fry your circuit if the previous user left the voltage turned up too high.  The circuit supplies 1 to 25V dc because it uses an LM317 regulator.  When you turn on the supply, the bridge develops __ Circuit Design by Tian Jin-gin, Taiyuan Semiconductor Factory, Taiyuan, Shanxi, China

Tiny Charge Pump Provides Highly Reliable Low Cost Solution to Negative Reference Voltage -  App Note #348__ Maxim Integrated

Two AA cells power step-down regulator -  01/07/99 EDN Design Ideas:  (Scroll to find this one) DC/DC conversion is particularly challenging when both the input and output voltages are low.  Step-up ICs  that operate with inputs lower than 1V are available, but step-down ICs  that accept input voltages   Page includes several designs.   __ Circuit Design by Len Sherman, Maxim Integrated Products, Sunnyvale, CA

UCC38C42 25-Watt Self-Resonant Reset Forward -  This is an App Note that describes a reference design.  This reference design presents a self-resonant reset forward converter using the UCC38C42 BIC MOS Low-Power Current-Mode PWM Controller.  The input voltage for this converter is compatible with the telecom input voltage range of 36 VDC to 72 VDC.  The converter is designed to operate at a switching__ 

Ultra Low Drop Linear Regulator -  The circuit is a MOSFET based linear voltage regulator with a voltage drop of as low as 60 mV at 1 ampere.  Drop of a fewer millivolts is possible with better...__ Electronics Projects for You

Use Two Reference Voltages to Improve Hysteresis Accuracy -  01/07/10  EDN Design Ideas:  increase the hystereis of your comparator by switching between two reference voltages __ Circuit Design by Marin Stofka, Slovak University of Technology, Bratislava, Slovakia

Voltage reference improves JFET -  26-Oct-00 EDN Design Ideas:  The common JFET current-source in Figure 1a has average output impedance and depends heavily on the JFET's VP and iDSS variations.  These manufacturing variations limit the initial accuracy of the current setpoint that the circuit can obtain with a fixed R1.  Most users of JFET current-sources sample VPPDF has several circuits, scroll to find this one __ Circuit Design by Clayton Grantham, National Semiconductor, Tucson, AZ

Water Level Reference Design -  The Water Level Reference design continuously monitors water level and water flow using the temperature compensated MPXM2010GS pressure sensor in the low cost MPAK package, a dual opamp, and the MC68HC908QT4, 8pin microcontroller.  This system uses very few components, reducing the overall system cost.   __ Designed by Freescale


Reference:   #'s - O       P - Z

 


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