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 ...
    24-09-2015

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 ...
    11-11-2015

83. Two Terminal Bipolar Power Supply
    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, ...
    14-10-2019
84. Ultralow Noise, 48 V, Phantom Microphone Power Supply Using a Tiny DC-to-DC Boost Converter
    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 ...
    02-06-2020
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 ...
    10-09-2020
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 ...
    17-12-2020
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 ...
    13-01-2021
88. Precision clamp protects data logger
    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 ...
    14-10-2021
89. Class-AB current booster provides high output voltage swing
    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 ...
    29-11-2021
90. Germanium Dual-Boost Starts At 260 mV
    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 ...
    14-01-2022

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