Power-Miserly Voltage Reference Needs Just One Pin -  08/20/09  EDN Design Idea   A capacitor holds a reference voltage so that the microcontroller pin can perform other tasks. . .  [by Peter T Miller, Applied Inspirations LLC, Bethlehem, CT]

Precision Voltage follower -  In the previous op-amp experiment, the amplifier was used in "open-loop" mode; that is, without any feedback from output to input. As such, the full voltage gain of the operational amplifier was available, resulting in the output voltage saturating. . . 

Precision voltage reference delivers 80 mA -  12/01/06  EDN Design Idea   Robust, 4. 096V reference source packs a punch. . .  [by James Horste and Gary Staiman, Maxim Integrated Products Inc, Sunnyvale, CA]

Pushbutton replaces rotary switch -  10/26/00  EDN Design Idea   The problem of setting any one of four modes of aµC-operated process has a straightforward solutionHave theµC check the states of some 4 bits of aµC. . . .  [by Abel Raynus, Armatron International Inc, Melrose, MA]

Regulator Makes Dual Tracking Reference -  11/07/96 EDN Design Idea   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 stand. . .  [by James Mears, National Semiconductor, Tacoma, WA]

Save 3 dB of Output Power Using Feedback to Set the Output Impedance -  10/06/11  EDN Design Idea   You can use this with high-side or low-side output current sensing. . . .  [by Vic Jordan, Carson City, NV]

Supply Delivers Pin-Programmable Multiple References -  05/01/03  EDN Design Idea   In the circuit of Figure 1, the REF01, IC1, is a buried-zener-diode-based, precision 10V reference that features minimal noise and drift over temperature. The circuit provides not only the 10V output of the REF01, but also a 5V outp. . .  [by V Manoharan, Kochi, India]

The Effect of Long-Term Drift on Voltage References -  AN-713 Analog Devices Application Note. . . 

Thermometer Applications of the REF-02 -  AN-18 Analog Devices Application Note. . . 

Video Design Idea: Build your own laboratory precision voltage reference -  05/24/07  EDN Design Idea   demonstrates an amplifier-based circuit design for a relatively inexpensive precision voltage source. . .  [by Mark Thoren, Linear Technology, Milpitas, CA]

Voltage reference improves JFET -  10/26/00  EDN Design Idea      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 t. . .  [by Clayton Grantham, National Semiconductor, Tucson, AZ]

Voltage reference is software-programmable -  08/18/05  EDN Design Idea   Obtain extra reference voltages from existing ones. . .  [by Reza Moghimi, Analog Devices, San Jose, CA]

Voltage Reference sets Current Limit -  11/19/98 EDN Design Idea  (File has serval designs)  ower op amps have a real need for active output-current limiting. Most power-amplifier designs rely on the voltage drop across a user-supplied sense resistor to turn on an internal transistor. This method has several drawbacks, notably, an inability to change the current-limit point under program control. The current-limit circuit in Figure 1 allows you to establish the setpoint by applying a voltage to one of the amplifier's pins. With this design, it is possible to set the current-limit point with the output of a DAC, possibly under the control of an embedded µC. . . .  [by Joe Engle, Burr-Brown Corp, Tucson, AZ]