Circuits & Schematics Analog Devices - 9

81. Some Basic Math Creates A Low-Cost Nonlinear Thermocouple Interface
    Robert S. Villanucci
    Circuits Measurement Analog Devices AD633 LT1025 OP177GS
    Measurement and process control loops often use 8-bit microcontrollers. The devices are inexpensive and widely available, and they can be programmed in many popular high-level languages like C and Basic. However, if the loop requires a nonlinear ...
    Aug 1, 2022
82. High-power shunt regulator uses BJT & reference IC
    Chris Toliver
    Circuits Analogue Design Supply Analog Devices AD584
    Some voltage references can be used as shunt regulators, either by tying V IN and V OUT together or by leaving V IN open. These devices are limited to low currents, however, with a typical limit of around 10 mA. Standard Zener diodes serve the same ...
    Jul 25, 2022

83. Flying capacitor and negative time constant make digitally programmable-gain instrumentation amplifier
    Stephen Woodward
    Circuits Analogue Design Amplifiers Analog Devices LT1214 LTC6915
    Numerous and evil are the forces of darkness that conspire to frustrate accurate analog-to-digital conversion of wide-dynamic-range analog signals. Among these gremlins lurk common-mode-voltage noise and signal amplitudes too variable to fully use ...
    Jul 21, 2022
84. Two-Transistor Circuit Replaces IC
    Jim Hagerman
    Circuits Supply Analog Devices LTC4300A-1
    Linear Technology's recently introduced LTC4300 chip buffers I 2 C clock and data lines to and from a hot-swappable card. This task is difficult because the IC must work bidirectionally, meaning that you can simultaneously and actively drive ...
    Jun 30, 2022
85. Pulse Generator with Precision Output-Duty Cycle Operates at a Repetition Rate beyond 50 MHz
    Marián Štofka
    Circuits Oscillators Analog Devices ADCMP603
    A previous Design Idea describes an astable multivibrator that gets hysteresis from the positive feedback stage using a technique you can characterize as positive-capacitive feedback ( Reference 1 ). It creates hysteresis by a charge transfer to ...
    Jun 29, 2022
86. Transconductance Amp Gives Oscillator Reciprocal Response
    Mike Irwin
    Circuits Oscillators Analog Devices AD843
    The circuit in Figure 1 is a variation on the familiar integrator/comparator triangle-wave oscillator, which you typically implement with two op amps. An integrator and a comparator connect in a positive-feedback loop; the comparator drives the ...
    Jun 21, 2022
87. Positive edges trigger parabolic timebase generator
    Marián Štofka
    Circuits Oscillators Analog Devices ADA4062 ADCMP609 ADG1213 ADG1236 ADR433
    Nonlinear systems often need to become linear to be useful, and the circuit in Figure 1 provides a nonlinear sawtooth pulse for a PWM (pulse-width modulator) that can compensate for nonlinearities in sensors, controllers, or systems. The circuit ...
    Jun 20, 2022
88. Dynamic-Load Circuit Determines a Battery's Internal Resistance
    Jim Williams
    Circuits Measurement Supply Analog Devices LT1077 LTC1150 LTC1798 LTC6943
    The simplest model of a battery comprises an ideal voltage source that connects in series with a resistance whose value often a few milliohms depends on the battery's electrochemical condition and construction. If you attempt to use an ordinary ...
    Jun 16, 2022
89. Switched-gain op amp serves as phase detector or mixer
    W Bruce Warren
    Circuits Analogue Design Analog Devices AD8041
    Some op amps, such as the AD8041 from Analog Devices and the EL5100 from Intersil, provide a disable pin, which allows you to parallel the outputs of several op amps for video multiplexing. In addition to this multiplexing, you can also use the ...
    Jun 16, 2022
90. Volume-Unit Meter Spans 60-dB Dynamic Range
    Jon Munson
    Circuits Audio Measurement Analog Devices LT1011 LT1469
    An audio volume-unit meter displays peak-related audio amplitudes to aid in accurately setting recording levels or for displaying an amplifier's operating conditions. A simple diode and capacitor network provides a classic volume-unit ...
    May 24, 2022

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