A switched-mode power supply employing peak current-mode control requires a ramp signal to slope-compensate the inner (current) control loop. Slope compensation stabilizes the current loop, which would otherwise exhibit subharmonic oscillation...
Articles and news - 2
Constant-Current Source Creates Slope-Compensation Ramp in SMPS
Generate Positive and Negative Voltage by Combining Two DC Sources
Using two unipolar dc supplies in an anti-series configuration is another approach for generating positive and negative voltage – and one that doesn't suffer from power interruption...
Circuit yields ultralow-noise VGA
A number of single-chip VGAs variable-gain amplifiers are available today. Unfortunately, they all have drawbacks, such as high noise, 55 V limit, low input impedance, or nonlinear gain/frequency characteristics. The circuit iis a 16-step, ultralow-noise VGA that solves many of these problems...
Low-cost switcher converts 5 to 24V
The low-cost, three-transistor boost switching regulator iis a modified astable multivibrator comprising...
Clamping Circuit Lowers Distortion, Improves Overdrive Recovery Time
Some amplifier applications require clamping or limiting due to large, sporadic signals appearing at the amplifier input. Clamping these errant signals protects the amplifier and other sensitive downstream circuitry...
Ideal switches pose their own challenges
Ask a power converter designer what they want from a semiconductor switch and the answer might be something like: “Low on-resistance, high off-resistance, and the fastest possible transition between the two states”...
Single capacitor sine-wave RC-oscillators
Sine-wave RC-oscillators with smooth frequency tuning described in the article radically and favorably differ from previously known generators of this purpose by the presence of only one frequency-setting capacitor...
A differential, optically isolated driver for testing of an instrumentation amplifier
Some of the electrical signals we work with are said to be “floating” with respect to ground. A typical example might be a voltage drop over a shunt resistor in a power supply or a complex biomedical signal...
E-PEAS Unveils Constant Voltage PMICs for Intermittent Input Energy Harvesting Arrangements
Through the release of a further three new power management ICs, e-peas is providing product developers with even greater scope to implement their energy harvesting systems...
Asymmetric Output Into Capacitor Load Turns Capacitor Into Ideal Diode
Comparators are great at turning little signals into large digital outputs. In the example described here, a friend wanted to detect the presence of a small 60-Hz AC signal centered on 2.5 V DC...
