Circuits & Schematics Analog Devices - 5

41. 20 picosecond rise time pulse generator
    Jim Williams
    Circuits Oscillators Analog Devices LTC1799
    Figure 1, fast rise time pulse generator, switches a high grade, commercially produced tunnel diode mount to produce a 20 ps rise time pulse. O1’s clocking (trace A, Figure 2) causes Q1’s collector (trace B) to switch the capacitively ...
    Aug 17, 2023
42. Circuit converts DAC's outputs from single-ended to differential mode
    Liam Riordan
    Circuits Signal Processing, Filters Analog Devices AD5424 AD8042
    High-speed DACs offer differential outputs, but, for low-end ac applications or high-precision level-setting applications, a single-ended current-output DAC with a differential-conversion circuit provides a novel approach to generating ...
    Jul 13, 2023

43. Bootstrap biasing of high input voltage step-down controller increases converter efficiency
    Goran Perica Victor Khasiev
    Circuits Supply Analog Devices LTC3890 LTC3891
    Introduction High voltage buck DC/DC controllers such as the LTC3890 (dual output) and LTC3891 (single output) are popular in automotive applications due to their extremely wide 4 V to 60 V input voltage range, eliminating the need for a snubber ...
    Jul 5, 2023
44. Broadband random noise generator
    Jim Williams
    Circuits Oscillators Measurement Analog Devices LT1004 LT1006 LT1013 LT1226 LT1228
    Filter, audio, and RF-communications testing often require a random noise source. Figure 1’s circuit provides an RMS-amplitude regulated noise source with selectable bandwidth. RMS output is 300 mV with a 1 kHz to 5 MHz bandwidth, selectable ...
    Jun 27, 2023
45. 3.3V powered V/F converter
    Jim Williams
    Circuits Measurement Analog Devices LT1017 LT1034 LTC1043
    Figure 1 is a “charge pump” type V/F converter specifically designed to run from a 3.3 V rail. A 0 V to 2 V input produces a corresponding 0 kHz to 3 kHz output with linearity inside 0.05%. To understand how the circuit works assume ...
    Jun 26, 2023
46. Constant-voltage load box for battery simulation
    Jon Dutra
    Circuits Measurement Supply 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
47. Battery internal resistance meter
    Jim Williams
    Circuits Measurement Supply 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
48. Amplifier compensates piezoelectric-rate gyros
    Jim Mahoney
    Circuits Measurement 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
49. Dual-input sample-and-hold amplifier uses no external resistors
    Marián Štofka
    Circuits Analogue Design Signal Processing, Filters Analog Devices AD8592
    At least two classic ways exist to address applications requiring sampling of a sum of analog voltages. The most common way is to cascade a classic analog adder and a sample-and-hold amplifier. A classic analog adder is an op amp plus at least ...
    May 30, 2023
50. Zero-bias detector yields high sensitivity with nanopower consumption
    Mitchell Lee
    Circuits Wireless Analog Devices LTC1540
    RFID tags, circuits that detect a “wake-up” call and return a burst of data, must operate on very low quiescent current for months or years, yet have enough battery power in reserve to answer an incoming call. For smallest size, most ...
    May 23, 2023

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