Digital-system designs require you to consider many core voltages. Memory operates at 1.8 V, I 2 C and FPGA devices operate at 3.3 V, microcontrollers operate at 5 V, and charge-coupled-device image sensors operate at 9 to 8 V. Clocks for each ...
The design in Figure 1 is a visible optical link for those who need to see the transmitted data. An isolation figure of more than 5000 V is a bonus. Tests of the system used the COM input of a data-acquisition system, as well as a standard PC's ...
One of my go-to diagnostic tools is a simple home-brew audible ohmmeter (AudOhm). This circuit has served me well for many years, allowing “heads up” testing of wiring harnesses and control equipment, and various components such as ...
The absolute-value amplifier is a basic building block in test-and-measurement and signal-processing applications. The addition of a DPP (digitally programmable potentiometer) adds another dimension, G (gain), to this key circuit. Because the gain ...
The circuit in Figure 1 produces a single debounced pulse each time you press S 1 . Moreover, the circuit uses only logic power from the remote pull-up resistor, R 2 . You can use the circuit to detect when a key is pressed in a nonenergized ...
Adding a current-mirror circuit to a typical boost circuit allows you to select the amount of boost voltage and to ensure a constant difference between the input and the output voltages (Figure 1). This circuit is useful for high-side-drive ...
You enjoy significant advantages when using DPPs (digitally programmable potentiometers) with increment/decrement serial interfaces. Programming the serial interface is simple and fast, and you can adjust the potentiometer in real-time ...
The availability of a seemingly limitless variety of monolithic DAC chips makes it easy to implement most digital-to-analog-conversion applications with a single off-the-shelf device. Sometimes, an unusual set of requirements necessitates a ...
P-channel MOSFETs can simplify designs when you use them as high-side switches on circuits with voltages exceeding 100 V dc. When driving a MOSFET, you must rapidly charge and discharge the input capacitance between its gate and its source to ...
Electronic Design In this Idea for Design, using a comparator-based switch-mode driver circuit of a solenoid improves efficiency by tailoring the drive to the pull-in versus hold-mode current requirements. Several years ago, Paul Rako, in ...