All Sections: LT Spice - 10

91. Constant-voltage load box for battery simulation
    Jon Dutra
    Circuits Analog Devices LT1211
    This article describes an active load circuit that can be used to simulate a battery in any state of charge. The battery simulator provides a constant-voltage load for a battery-charging circuit, independent of applied charging current. The ...
    Jun 22, 2023

92. Battery internal resistance meter
    Jim Williams
    Circuits Analog Devices LT1077 LTC1150 LTC1798 LTC6943
    It is often desirable to determine a battery’s internal resistance to evaluate its condition or suitability for an application. Accurate battery resistance determination is complicated by inherent capacitive terms which corrupt results taken ...
    Jun 22, 2023

93. Simple, precise, bi-directional current source
    Jerry Steele
    Articles onsemi NCS2005
    .. (R SENSE should be limited to 1 kΩ unless you are adventurous). A caution on simulating this circuit. Not all op amp spice models correctly model the flow of load current in the power supply pins, an essential behavior to simulating ...
    Jun 20, 2023
94. Quasiresonant flyback converter easily charges energy-storage capacitors
    Todor Arsenov
    Circuits STMicroelectronics L6562 L6565
    Designers often use chargers with flyback topologies to quickly charge energy-storage capacitors (references 1 and 2 ). In a flyback topology, the energy transfer takes place only when the charger’s power MOSFET is off, which effectively ...
    Jun 8, 2023
95. Topology implements updated version of non-isolated capacitive power converter
    Zbyno Brudny
    Circuits Linear Technology LTC1046
    .. only a very short time when the charge from C1 has to supply the rest of the circuit. The circuit has been simulated using LT-Spice version 4.19, as well as built and tested (Fig. 3). Figure 3. C1 has to supply the rest of the circuit of ...
    Jun 2, 2023
96. Amplifier compensates piezoelectric-rate gyros
    Jim Mahoney
    Circuits Analog Devices LT1368 LT1495
    Low-power, low-cost ceramic piezoelectric rate gyros are available, but they lack the low-temperature-coefficient characteristics of their quartz counterparts. However, you can use a servo amplifier to remove the dc level shift due to ...
    May 31, 2023
97. Sensing negative outputs
    Dimitry Goder
    Circuits Linear Technology LT1172
    Various switching regulator circuits exist to provide positive- to-negative conversion. Unfortunately, most controllers cannot sense the negative output directly; they require a positive feedback signal derived from the negative output. This ...
    May 29, 2023
98. Automatic load sensing saves power in high voltage converter
    Mitchell Lee
    Circuits
    There are a surprising number of high output voltage applications for LTC’s micropower DC/DC converter family. These applications include electroluminescent panels, specialized sensing tubes and xenon strobes. One of the key features of the ...
    May 16, 2023
99. 1Hz-100MHz V-F converter
    Jim Williams
    Circuits Analog Devices LT1460 LTC1150 LTC6943
    Figure 1’s circuit achieves a wider dynamic range and higher output frequency than any commercially available voltage to frequency (V-F) converter. Its 100 MHz fullscale output (10% overrange to 110 MHz is provided) is at least ten times ...
    May 12, 2023
100. 5 V to 200 V Converter for APD Bias
     Jim Williams
     Circuits Linear Technology LT1172
     Before proceeding any further, the reader is warned that caution must be used in the construction, testing and use of this circuit. High voltage, lethal potentials are present in this circuit. Extreme caution must be used in working with, and ...
     May 12, 2023

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