Bella Cheng’s Post

#Highpressuremixingpumps: #Binarypump #Quaternarypump #HPLC Adjustments to the mixer's volume and design aim to strike an ideal balance between the uniformity of mixed solvents and dwell volume. 💡 Binary pumps generally incur higher costs but offer the advantage of lower dwell volumes. Solvent selection valves are used to choose additional solvents for unmanned methods or application switching. Typically, each production line can select one solvent from up to four solvent reservoirs, delivering only binary solvent mixtures at a time. Many early UHPLC systems utilized binary pumps to reduce dwell volume and achieve better component accuracy performance.   💡 Quaternary pumps all adopt low-pressure mixing designs, where a single pump unit draws the mobile phase from a four-port proportioning valve. The pump's microprocessor controls the solvent composition for each suction piston stroke by timing the opening of each solvent port.

New Case Study: AE’s HVA Series enhances accuracy and reliability in a high-precision resistance bridge measurement system in metrology instrumentation. The compact and modular HVA series high voltage amplifier, bipolar in nature, provided a fast-reversing 10kV high voltage DC signal, crucial to bias the system’s range extender module accurately and reliably. Read more here: bit.ly/4dODpiF #Metrology #Power #Innovation #Precision

Describing the need for resistive biasing in Common Emitter and how to achieve the different biasing Resistive biasing plays a crucial role in common emitter amplifier circuits by establishing the transistor's operating point, known as the quiescent point (Q-point). This ensures the transistor operates within its active region, enabling linear amplification without distortion. Two primary types of resistive biasing configurations exist for common emitter amplifiers: Fixed Bias configuration In this setup, a fixed voltage bias is applied to the base-emitter junction through a resistor linking the base to a voltage source (VBB). Typically, the emitter is grounded, and a resistor (RE) is connected between the emitter and ground to stabilize the Q-point. The Q-point is established at the intersection of the load line and the DC load line on the transistor characteristic curves. Voltage Divider Bias configuration In this arrangement, a voltage divider network comprising two resistors, R1 and R2, is employed to supply the base bias voltage (VBB). In both setups, resistive biasing guarantees stable transistor operation by positioning the DC operating point at a suitable level on the transistor's characteristic curves. #100daysamplifierdesign Pipeloluwa Olayiwola

Thermal Interface Materials or TIMs are products that conduct heat between two or more solid mating surfaces. For example, these materials can aid in the thermal management involving semiconductor devices and a heat sink by serving as gap fillers between the two mating surfaces. cynthina@szdobon.com #thermalsiliconepadsupplier #thermalpadsfactoryinChina #heatdissipationsiliconepads #thermalinterfacematerial #ThermallyConductiveSiliconeInterfacePads #TIM #thermalconductivematerial #insulatingsiliconetape #thermalgraphitesheet #thermallyconductivepottingglue #thermallyconductivesiliconepad #thermalgrease #thermalconductivedoublesideadhesive #siliconethermalpad #Thermalconductivesheetmaterial #thermallyconductivesiliconegrease #thermallyconductivesiliconepaste #Thermalgrease #thermallyconductivepads #thermalpads #gapfillerpads #3Mthermalpads

💡 Want to make a difference to your measurements? Discover Pendulum Instruments #CNT102 Multichannel Frequency Analyzer Applications for Oscillator manufacturer, R&D & Oscillator test systems: ·      Complete characterization (better and faster than before) ·      Turn-on stability (power-on) ·      Short-term stability (ADEV) ·      Ageing rate and temperature stability ·      Wander (TIE) for network clocks ·      Compare up to 2  test objects in parallel ·      Replace 2 legacy Frequency Counters with 1 CNT-102 ·      Save cost and space https://lnkd.in/g38WZra2 #oscillators #ADEV #penduluminstruments #CNT104S #testandmeasurement

The three-phase inverter is compounded by three legs. Each leg contains two electronic switches that are arranged in such a way that create a half-bridge topology. Therefore, current can flow in both directions to and from the legs. The electronic switches can be either power MOSFETs or IGBTs. Current MOSFET and IGBT manufacturing technologies have allowed digital controllers to take advantage of Pulse-Width Modulation (PWM) techniques to control the amount of energy applied to each coil. The most common techniques used are sinusoidal modulation, third-harmonic modulation and Space Vector Modulation (SVM). These PWM techniques are suitable to operate the electronic switches in saturation mode, which helps to increase system efficiency. In order to determine the amount of current flowing through the coils, a shunt resistor is required on each coil.

We used a paper clip and graphite sheet to do an electrical conductivity experiment. Please watch below video from Dasen. Graphite sheet is widely used as conductive materials in the electronics industry. Because graphite sheet has good electrical conductivity, it can be used as a conductive film of copper foil circuit board. In addition, graphite sheet can also be used to make electrode materials, such as negative electrode materials for lithium-ion batteries and conductive layers for solar cells. #Dasen #pgs #graphitesheets #electricconductivity #thermalconductivity

Top 4 channels USB compact #noise and #vibration analyzer , with UP TO 256kHZ (kS/s) SAMPLING #FREQUENCY OROS

Using an LCR meter to calculate the inductor value for design and testing is the most inaccurate forecast in "In-circuit performance." The component can be sinusoidally waved throughout a limited frequency range using an #lcr meter. The ideal method for determining how the power environment changes dynamically over an Inductor and Transformer. A 4-Series #mixedsignal Oscilloscope is equipped with the simulation tool 5-PWR Advanced #Power Analysis Software, which measures - Gain B-H Curve or Hysteresis (Magnetic Flux Density ~ Magnetic Field Strength) - Total Magnetic Loss (Copper + Core Loss). https://lnkd.in/gmc27fgd. #smps #transformer #inductor #bhcurve #magneticloss #tektronix