Op amps find use in second-order filters and instrumentation amplifiers. In part 3 of this series, we described using the op amp to build some single-pole filters. Q: How do we build higher-order filters? A: Figure 1 shows one approach to a low-pass filter using the Sallen-Key topology. With two capacitors, it’s a second-order filter. […]
data acquisition
How to choose analog-signal-chain components: part 3
Use op amps, resistors, and capacitors to build high-pass, low-pass, and bandpass filters. In part 1 of this series, we looked at a noisy signal and discussed why it might be better to use an analog filter instead of a digital filter. Then, in part 2, we looked at the operational amplifier (op amp) and […]
R&S digital multimeters feature 5.5 and 6.5 digits with triple displays
The UDS series from Rohde & Schwarz provides the company with a significant upgrade and place it against top competitors. Digital multimeters (DMMs) are a measurement staple, sitting alongside oscilloscopes, power supplies, and waveform generators on just about every engineer’s bench. You may not think of Rohde & Schwarz as a major competitor in the […]
FieldDAQ captures physical data close to the sensor
FieldDAQ modules accept sensors directly and send data over Ethernet. Collecting data such as temperature, strain, and other physical parameters often requires long sensor wires or rugged equipment close to the measurement source. Long wires can add errors due to losses in analog wiring or from outside interference. Field installations often add environmental and power […]
How to choose analog-signal-chain components: part 1
Signal conditioning can prepare a sensor’s output for digitization. In a previous series, we looked at the analog-to-digital converter (ADCs) and sources of error that occur within the device. Of course, errors can creep in upstream of the ADC along the analog signal chain as the signal to be digitized is acquired and conditioned. Q: […]
Understanding ADC specs and architectures: part 4
The AC performance of an analog-to-digital converter depends on its architecture. In part 3 of this series, we discussed the integral nonlinearity (INL) error of an analog-to-digital converter (ADC), noting that gain, offset, and INL error all contribute to the total unadjusted error. This metric provides an overall view of an ADC’s DC performance. Q: What about the AC […]
Modular tester simulates and tests control systems
The Pulse Real-Time Target Machine from Swiss company Speedgoat uses a set of I/O modules so you can configure s test system that meets your needs.
Modular system combines DMM with DAQ
The DAQ3120 from B+K Precision lets you install up to three measurement modules to create a custom system for your bench. Most engineers have a digital multimeter (DMM) for basic measurements such as voltage, current, and resistance. Sometimes, however, you need the flexibility to add channels and log measurements without or without a computer. That’s […]
APEC 2025 test equipment: power sources and loads
Powering electronic devices requires the testing of power supply and charging circuits, battery management systems (BMSs), and battery cells. Many of these circuits require voltage, current, and power measurements, plus numerous others. Oscilloscopes and probes let you see the waveforms in power-delivery circuits, but the circuits themselves may need simulated batteries and simulated loads. That’s […]
Ethernet/LXI digitizers feature 12-bit resolution and up to 4.7 GHz bandwidth
Spectrum Instrumentation has introduced seven new digitizers in the DN2.33x series for signal acquisition and analysis in the GHz range. The devices connect via Ethernet/LXI interface to computers or networks and are designed for both R&D and industrial applications. The DN2.33x series digitizers utilize ADC technology with sampling rates between 3.2 GS/s and 10 GS/s, […]
