Circuits & Schematics: net - 6

51. Sound-Card Signal Generator Interface Adds Variable Offset Control
    Circuits Audio Computers and Peripherals
    .. and offset by the inverting summing amplifier U2A to form the signal-generator’s output. Figure 3. The associated VB. Net code provides an easy-to-use PC graphical interface for setting the function generator’s critical parameters.
    11-02-2015

52. High-impedance FET probe extends RF-spectrum analyzer's usable range
    Circuits Analogue Design Measurement Texas Instruments OPA656
    .. loads for a total load of 100 Ω, which results in a 6-dB gain loss for which IC1's gain of two compensates for a net gain of unity. The OPA656 also introduces lower noise and distortion than that of most commercially available, ...
    14-02-2016

53. Battery-powered amplifier has optical isolation
    Circuits Analogue Design Measurement Maxim MAX406
    .. less than 1% transfer-function nonlinearity. With suitable adjustment of the SPAN potentiometer, a 50-mV input produces a net Q 2 , Q 3 , Q 4 composite current of 500 µA and 5 V output voltage, ideal for direct input to a typical A/D ...
    03-11-2016
54. Square-root function improves thermostat
    Circuits Analogue Design Measurement Texas Instruments LM399
    .. linearization with constant loop gain. E is the product of A and C and is the achieved loop-gain linearization. The net result is a linear relationship between the control circuit and heater outputs and a consequent optimization of the ...
    26-04-2017
55. Raspberry Pi GPIO Explained. Part 2
    Circuits MCU Open-Source Platforms Raspberry Pi
    .. by Gordon Henderson. First off, install the wiringpi library: mkdir development cd development git clone git://git.drogon.net/wiringPi cd wiringPi ./build Next, save the following code into a file called voltmeter.c . The code can be ...
    13-09-2017
56. Instrumentation amp has low offset, drift, and low-frequency noise
    Circuits Analogue Design Analog Devices AD8231 AD8250
    .. a cascade of the autozeroed AD8231 instrumentation amp, IC 1 , with a preset voltage gain of eight, IC 2 , and IC 3 . The net result is that the input-voltage offset of IC 2 causes an RTI (referred-to-input) voltage offset, which decreases ...
    08-02-2018
57. Switched-capacitor IC and reference form elegant -48 to +10V converter
    Circuits Supply Texas Instruments LM2682 LMH6672 LMV431
    .. Q 1 , the 2N2222 transistor. The configuration of the transistor causes a V BE drop of approximately 0.7 V, resulting in a net voltage of 5 V for the next stage. The purpose of the transistor is to provide additional current to the LM2682 ...
    17-04-2018
58. Multilayer Capacitor Doubles as Varactor
    Circuits Oscillators Diodes CD74HC14
    .. behind the circuit in Figure 1 is to check the influence of a dc bias voltage on the frequency of a simple oscillator. The net result is a low-frequency VCO with a relatively large voltage-gain figure, which depends largely on the type of ...
    29-01-2019
59. Active-filter circuit and oscilloscope inspect a Class D amplifier's output
    Circuits Analogue Design Audio Measurement Maxim MAX9727
    .. signal paths present 5.5-kΩ impedances to each of the A and B amplifier sections' inputs. By inspection, the net 5.5-kΩ impedance from Section B's output to C 1 comprises the Thevenin-equivalent impedance of resistors ...
    03-09-2019
60. Diodes derive logarithms and exponentials to optically sense AC/DC current
    Circuits Analogue Design Measurement Texas Instruments LM324
    .. log-ratio calculation by D3, D4, and A2 taken from reference optos O3 and O4, controlled by feedback amplifier A3. The net result is that, in nulling A2’s output, A3 implicitly calculates a drive signal for O3/O4 that accurately and ...
    20-10-2019

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