Circuits & Schematics: Design - 10

91. Single IC forms precision triangular-wave generator
    Circuits Oscillators Analog Devices MAX9000
    .. V REF of 1.23 V into the above equations to obtain a value of 124 kΩ for R 1 and 66.5 kΩ for R 3 . You can now design the integrator. Considering the comparator’s two possible output states, the magnitude of current ...
    17-03-2023

92. Battery simulator has variable ESR response
    Circuits Measurement Supply Analog Devices LT1167 LT1236 LT1884
    .. a low-power or a sleep mode. The device takes short high-power pulses from the battery. The battery simulator in this Design Idea duplicates a battery’s ESR-response curve. If you place different values in the feedback network, ...
    16-03-2023

93. Method sets voltage in multiple-output converters
    Circuits Supply onsemi MC33023 MBR2030CTL MURS120T3
    .. you design a transformer for any power converter, you face several compromises. You must trade off core size against the ...
    08-03-2023
94. 90 µA Precision Voltage-to-Frequency Converter
    Circuits Analogue Design Measurement Texas Instruments LM334
    .. small switching currents. Figure 3, a plot of supply current versus operating frequency, reflects the low power design. At zero frequency, the LT1017 ’s quiescent current and the 35 µA reference stack bias account ...
    02-03-2023
95. Low-power, super-regenerative receiver targets 433-MHz ISM band
    Circuits Radio Analog Devices ADCMP371
    .. detection. Tune the detector so that the signal falls on the slope of the detector circuit's selectivity curve. This Design Idea presents a super-regenerative receiver that consumes less than 1 mW and operates in the license-free, ...
    01-03-2023
96. Add a manual reset to a standard three-pin-reset supervisor
    Circuits Supply Microcontrollers Usage Analog Devices ADM809
    .. a manual reset to a design usually involves designing in a new part with a manual-reset input. But, by adding a couple of low-value ...
    20-02-2023
97. Self-oscillating H bridge lights white LED from one cell
    Circuits Oscillators Supply Light Fairchild BC550 BC557
    .. can, for example, drive a diode-capacitor charge pump to generate negative supply voltage in battery-powered systems. This Design Idea shows how to use it to light a white LED from one cell without an inductor. РFigure 1. Resistors R 1 and ...
    15-02-2023
98. Platinum-RTD-based circuit provides high performance with few components
    Circuits Analogue Design Measurement Texas Instruments OP07C
    .. 3 ). An alternative circuit proposes adding only one extra resistor to the differential amplifier but provides neither design guidelines nor results ( Reference 4 ). This Design Idea fills the gap. Although circuit analysis is somewhat ...
    15-02-2023
99. 555 triangle generator with adjustable frequency, waveshape, and amplitude; and more!
    Circuits Oscillators Texas Instruments LMC555 TLV2372
    .. design idea with a 555 analog timer that can generate an arbitrary triangle/sawtooth with its waveshape and ...
    09-02-2023
100. Using LEDs as an RGB sensor
     Circuits Measurement Light Texas Instruments LM358 OPT101 TL431A
     .. R-sensor, a yellow LED for the G-sensor, and yellow-green for the B-sensor. The RGB sensor is made in the form of a working design with dimensions of 80 × 100 × 30 mm and is used in practical laboratory activities (Figure 2). ...
     19-01-2023

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