Circuits & Schematics: detector - 10

91. Instrumentation Amp Makes an Accurate Transimpedance Amp Too
    Stefano Salvatori
    Circuits Analogue Design Texas Instruments INA129 PGA204
    .. 2. Then, V BIAS can be applied to the IN(-) input of OA1 such that the same potential is virtually maintained by OA1 at the detector cathode. If the same voltage is applied to the IA’s REF input, Equation (1) still remains valid, ...
    Nov 3, 2016

92. Inverted bipolar transistor doubles as a signal clamp
    Circuits Analogue Design Radio Fairchild 2N3904
    .. and, with 40 µA of base drive, the emitter, current is around 10 µA. This current is sufficient in most level-detector applications for which the ac input amplitude changes slowly. Figure 2. A logarithmic scale of the ...
    Dec 14, 2016

93. Reset supervisor waits for stable supply
    Circuits Analogue Design Microcontrollers Usage Texas Instruments TLV3491
    Mike Mitchell EDN The power-up cycle of the supply voltage in embedded-system applications is sometimes not a clean event. This fact holds especially true in battery-operated systems, because the insertion of a battery often causes significant ...
    Mar 29, 2017
94. Interfacing Linear Sensors To An ADC Requires Only Basic Math
    Circuits Analogue Design Measurement Analog Devices OP177
    .. its linear performance with a sensor equation that’s typical of this type of semiconductor-based temperature detector: (2) where V T is the diode’s temperature-derived signal. By solving Equation 2 for the ...
    May 16, 2017
95. Color sensor achieves high dynamic range with auto exposure
    Circuits Measurement MCU Open-Source Platforms Light Arduino Hamamatsu S9032
    .. Gottardi EDN The Design Idea in Figure 1 is a color detector capable of generating an RGB triplet over a high dynamic range, a useful attribute for machine vision ...
    Jun 9, 2017
96. Low-cost RF sniffer finds 2.4-GHz sources
    Circuits Wireless Measurement Linear Technology LT5534
    .. in the 2.4- to 2.5-GHz frequency band. At the circuit's heart, a Linear Technology general-purpose LT5534 RF-power detector, IC 1 , measures RF-signal strengths from 55 to 5 dBm and provides an RSSI ...
    Nov 15, 2017
97. Energy Harvester Produces Power from Local Environment, Eliminating Batteries in Wireless Sensors
    Circuits Supply Linear Technology LTC3588-1
    .. all the critical power management functions: a low loss bridge rectifier, a high efficiency buck regulator, a low bias UVLO detector that turns the buck converter on and off, and a PGOOD status signal to wake up the microcontroller when ...
    Nov 29, 2017
98. Add Simple Temperature Monitoring To Battery-Management Systems
    Tim Regan
    Circuits Automotive Analogue Design Measurement Power Linear Technology LT6001 LTC6802
    .. with the LTC6802 include an accurate thermistor-based sensor for SOC calculations (Fig. 1) and a simple diode-based hotspot detector (Fig. 2). а) b) Figure 2. A simple diode array hotspot temperature sensor is formed using the LTC6802 ...
    Jan 23, 2018
99. Two wires control SPI high-speed ADC
    Circuits Interfaces Microcontrollers Usage Texas Instruments ADS7816
    .. the process. When the clock line initially goes low, it also asserts /CS to a low state. The time constant of the peak detector comprising D 1 , R 1 , and C 1 ensures that /CS does not go high until the clock line remains high for ...
    Feb 22, 2018
100. Use Inexpensive Components To Create An Infrared Close-Object Alert Circuit
     T.K. Hareendran
     Circuits Automation Measurement Robots Texas Instruments LM555 CD4060B
     .. through resistor R1, and the LED inside the opto sensor is illuminated continuously. The LM555 (IC1) is wired as a light detector plus medium-current inverting line driver. Usually, its output (pin 3) is low. The value of sensitivity ...
     Dec 10, 2018

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