Circuits & Schematics: Design - 3

21. Build a charge pump with ultralow quiescent current
    Circuits Supply Maxim MAX981 MAX4685
    .. pump. Until off-the-shelf options are available, it provides an alternative for designers seeking to implement a low-cost design without the use of inductors. Materials on the topic Datasheet Maxim MAX981 Datasheet Maxim MAX4685
    Nov 22, 2020

22. Discrete LED Color Organ
    Circuits Light Music
    .. newer type high intensity LEDs (3000 - 5000mcd) were used along with a very simple discrete transistor drive circuit. The design goals included small size and excellent portability, as well as long battery life. To begin, the required ...
    Nov 13, 2008

23. Novel circuit isolates temperature sensor from its host
    Alfredo Saab
    Circuits Measurement Microcontrollers Usage Maxim MAX845 MAX6576
    .. than 0.1 K. The output at Q 1 ’s collector can sink several milliamperes at a voltage excursion of 0 to 5 V. This design can accommodate temperature-to-frequency converters and other types of temperature sensors. References MAX845 ...
    Jun 23, 2020
24. Active Antialias Filter for 24-bit ADC Features Low Distortion, High SNR
    Circuits Analogue Design Audio Measurement Analog Devices LT6202 LTC2380-24 LTC6363 LTC6655
    .. Hoover, Analog Devices Electronic Design A high-resolution SAR ADC often needs a higher-order antialiasing filter, such as the third-order version ...
    Jul 12, 2020
25. SPI2CF - WLAN for AVR. Part 1
    Circuits Wireless Microcontrollers Usage
    .. while leaving much of the AVR functionality for other use and allowing fast and reliable WLAN data transfers. The final design was based on a PRISM chipset based compact flash WLAN card which is connected to the AVR CPU using a ...
    Jun 30, 2010
26. Negative Linear Regulator Features 0.8 µV RMS Noise and 74 dB Power Supply Rejection Ratio at 1 MHz
    Molly Zhu
    Circuits Supply Analog Devices LT3015 LT3090 LT3094 LT8582
    Design Note Low dropout (LDO) linear regulators have been widely used in noise-sensitive applications for decades. ...
    Jan 13, 2020
27. Single-Chip Circuit Delivers Direction Information In Encoders
    Guido Nopper
    Circuits Measurement Texas Instruments SN74HC14 SN74HC74
    .. or linear encoders are very common, but normally they do not provide a direction signal. This design shows an easy way to detect forward or reverse direction. Incremental encoders normally provide two output ...
    Dec 30, 2019
28. Use a Current Mirror to Control a Power Supply
    Giovanni Romeo
    Circuits Analogue Design Supply NXP BCV61
    .. mirror (Figure 2). Figure 2. This voltage-controlled power supply uses a current mirror. The precision you get from this design is tied to the precision of the current mirror you’ll use. If you decide for the Widlar basic ...
    Jan 14, 2020
29. JFET Follower Amplifier Cancels Distortion
    Dimitri Danyuk
    Circuits Analogue Design ON Semiconductor BC850 BC860
    .. is a portion of Q3’s emitter current. This can be helpful when Q1’s quiescent current is determined by other design objectives for example, noise performance. Figure 3. If the ratio of R3/R4 is changed, the required value of ...
    Dec 24, 2019
30. Use A DAC To Bias Your Varactor Diode
    Circuits Wireless Radio
    .. for offset voltage calibration elsewhere in the circuit, or it could be turned off when it isn’t in use. Space and design time can be saved by avoiding having to set up separate biasing schemes. Some DACs, such as the MCP4728, also ...
    Feb 29, 2012

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