Circuits & Schematics: Volt - 9

81. Schmitt trigger uses two transistors
    Circuits Analogue Design
    .. term depends on the gain of Q 2 , the measured voltage is usually somewhat different, but is typically in the 2 to 3 volt range. The current in RIN also adds into the voltage on R 2 (Eq. 9), and if R 1 is too small, the current will ...
    Sep 24, 2015

82. Linear ramp generator uses one op-amp
    Circuits Analogue Design Oscillators
    .. follower, with D1 D2 clamping the input to one diode drop above or below the output. When the input step-changes by a volt or more, the diodes will keep the voltage across R2 at a nearly constant 0.3 V (because the output will follow ...
    Nov 11, 2015

83. Two Terminal Bipolar Power Supply
    Victor Khasiev
    Circuits Supply Analog Devices LT8714
    .. positive output are shown in Figure 2. Figure 2. The topology of a 2-quadrant operation with a positive output. When the volt-second balance is in a steady state, the duty cycle can be derived from the expression: To verify the design, ...
    Oct 14, 2019
84. Ultralow Noise, 48 V, Phantom Microphone Power Supply Using a Tiny DC-to-DC Boost Converter
    Christopher Jarboe Thomas Mosteller
    Circuits Audio Supply Analog Devices LT8362
    .. of 63 V means that the required caps are both big and expensive. A second approach would be to increase the LT8362 output a volt or two and add an LDO regulator to the output. This requires a high voltage LDO regulator, which usually costs ...
    Jun 2, 2020
85. Precision active load operates as low as 2V
    Circuits Analogue Design Measurement Supply Texas Instruments LM10
    .. clockwise. On Range C, an external voltage source that connects to R 13 controls the load current at a rate of 1 A per volt with P 1 set fully clockwise. You can drive the external input with a function generator to test a power ...
    Sep 10, 2020
86. Scalable current load offers constant resistance mode
    Circuits Measurement Supply
    .. effective the voltage drop across the source resistor must be comparable to the threshold, making it a large fraction of a volt. The consequence is that the equalizing resistors dissipate large power, and the voltage drop across them eats ...
    Dec 17, 2020
87. Single IC Can Produce Isolated or Nonisolated ±12 V Outputs from 30 V to 400 V Input
    Circuits Supply Analog Devices LT8315
    .. C FLY , a second inductor L2, a catch diode D4, and the negative output capacitor C O2 . According to the inductor volt-second balance for the circuit loop of C O1 -L1-C FLY -L2, the average voltage across L1 and L2 is zero, so the ...
    Jan 13, 2021
88. Precision clamp protects data logger
    Jerry Steele
    Circuits Analogue Design Measurement Texas Instruments OPA333
    .. near the center of its 0 to 2.5 V range provides the best linearity. Figure 1. Clamp circuit to precision clamp a 2.5 Volt output while operating on a 2.5 Volt power supply. To achieve this, the reference voltage is halved via the ...
    Oct 14, 2021
89. Class-AB current booster provides high output voltage swing
    Jerry Steele
    Circuits Amplifiers Texas Instruments OPA1622
    .. shown in Figure 1 enables an amplifier that can deliver higher output voltage swings while still using standard (e.g., 15-volt) op amps at the front end. Figure 1. Schematic of high output voltage swing current booster. Higher swing is ...
    Nov 29, 2021
90. Germanium Dual-Boost Starts At 260 mV
    Clayton Grantham
    Circuits Supply Nichia NSPW500BS
    .. but it unconditionally starts at a very low voltage. Previous silicon-transistor boost circuits required approximately a volt to start and many more components. Figure 1. This open-loop boost circuit starts with as little as 260-mV input ...
    Jan 14, 2022

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