Circuits & Schematics: www.aaroncake.net - 2

11. Set DC input-stage gain/attenuation over a 96 dB range with PWM
    Circuits Signal Processing, Filters Texas Instruments TLV2372
    .. steer current feedback from A1’s output to its summing point via R2 with a programmable factor of (1 G/T), yielding a net V/I gain of while maintaining similar leakage-minimizing millivolt voltage differentials across U1a’s ...
    28-04-2023

12. DC/DC converter using transistors
    Circuits Beginners Supply Fairchild BC547
    .. V LiPo. But the circuit should not be costly and should be as small as possible. After looking at similar circuits over the net, I found several circuits but only one was satisfactory. After little modification, that circuit becomes very ...
    12-01-2023

13. Boost Converter Generates Three Analog Rails
    Circuits Supply Maxim MAX858
    .. IC’s current-limited, minimum-off-time, pulse-frequency modulation constantly adapts its switching frequency to the net load current; the frequency increases when the load increases, producing a greater transfer of energy via the ...
    21-12-2022
14. Smart Ripple Canceller Offers Near-Zero Dropout
    Circuits Supply
    .. current. The current is sensed by R5, and Q1 to Q3 mirror a scaled version through R2 and R3. This ensures that T1 see zero net flux at all times. Q2 is the error amplifier, and it receives the error voltage on its emitter, via C4. Stability ...
    10-10-2022
15. Active Emulator Supports Multiple RTD Wiring, Sense Configurations
    Circuits Measurement ON Semiconductor BSS138
    .. the temperature/voltage curve of a chosen thermistor. Reference “RTD Temperature vs. Resistance Table,” www.omega.com/temperature/Z/pdf/z252-254.pdf Materials on the topic Datasheet ON Semiconductor BSS138 Datasheet Texas ...
    08-09-2022
16. One Oscillator Drives Multiple Solid-State Relays
    Circuits Power ON Semiconductor IRF530
    .. Transformer-isolated gate driver provides very large duty cycle ratios , Application Note 950, International Rectifier Co, www.irf.com/technical-info/appnotes/an-950.pdf. Balogh, Laszlo, Design and application guide for high speed MOSFET gate ...
    06-09-2022
17. Self-heated Darlington transistor pair comprises new air flow sensor
    Circuits Measurement Texas Instruments LM10
    .. ’s differential comparison independent of ambient temperature and influenced only by airspeed. Note that Q 1 ’s net junction temperature (rise + ambient) remains below the 2N4401’s max rated 150 C in ambient temperatures as ...
    23-08-2022
18. Instrumentation-amplifier-based current shunt exhibits 0V drop
    Circuits Measurement Analog Devices AD8223
    .. I/0. This voltage is equal in magnitude to a voltage drop on R 1 and has the opposite polarity to ΔV R1 . The net result is that the value of voltage at Input A is theoretically 0 V, regardless of the magnitude and polarity of ...
    22-08-2022
19. Use Dual Op Amp in an Instrumentation Amp
    Circuits Signal Processing, Filters Amplifiers Texas Instruments OPA2111
    .. on matching values for the four resistors labeled R. DC CMRR (common-mode rejection ratio) is the reciprocal of the net fractional resistor mismatch; that is, 10,000-to-1 ( 80 dB) for a 0.01% mismatch. AC CMR, on the other hand, is ...
    16-03-2022
20. Sub-picofarad measurement with CMOS inverters
    Circuits Measurement Texas Instruments CD4069UB
    .. compensated waveform from the astable, where a and b phases produce equal and opposite deflection in the meter causing a net null deflection. However the delay along the ramp line causes one of the signals to have an offset for a duration ( ...
    09-03-2022

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