A common problem that arises when you design lowpass filters for signal conditioning is the filters' effect on the system's time-domain response. Because pushing the cutoff frequency lower slows the step response, the system may fail to ...
This self-heated constant-temperature-delta transistor anemometer is cheap, rugged, and sensitive. It relies on the relationship between airspeed (A F ) and thermal impedance (Z T = C/W) of a heated air flow sensor as shown in the formula below for ...
In a previous Design Idea, a circuit switches precision dc reference voltages to the noninverting input of a high-speed IC comparator (Reference 1). The circuit uses a 2-to-1 multiplexer that functions in a BBM (break-before-make) fashion. ...
This Design Idea builds on a previous one ( Reference 1 ) to realize a precision peak detector with a bandwidth of 15 to 30 MHz or more, depending on the maximum input-signal level of your application. The crucial feature of this Design Idea is an ...
Amplification of sub-picoamp signal currents is always a design challenge, especially when gain adjustment is required that spans multiple decades. A straightforward approach to the design task would normally involve potentiometers and teraohm ...
Here is a simple frequency doubler circuit that produces a square wave output with a precise 50 percent duty cycle. There are similar circuits in the literature [References 1, 2, 3] which require adjustments or selection of some components to set ...
In advanced IC comparators, programmable hysteresis eliminates 0V-centered differential-input-voltage noise and improves the comparator’s response if its differential-input voltage is low or varies slowly over time. For example, the ADCMP609 ...
You can remotely measure temperature using a 4- to 20-mA current loop as long as 4000 feet and a battery-powered, white-light LED driver. You usually configure this equipment to provide a programmable, constant current to an LED from a battery ...
Circuits sometimes need a gain-of-one buffer to lower output impedance and prevent the load from interfering with the previous stage. For an application involving a 1.5-MHz, low-power transmitter and antenna, a BUF634 buffer IC would work, but a ...
This design idea presents a practical circuit that implements synchronous detection to amplify small DC voltages with high linearity and excellent noise immunity. Such circuits are required in measurements involving current shunts, load cells, ...