Схемы - Усилители - 2

Marián Štofka

The advent of instrumentation amplifiers with digital gain switching offers obvious advantages, such as board-space saving, higher reliability because of fewer solder joints, and lower total cost. These valuable features stem from the fact that the ...

Enrique Vargas Raúl Gregor Sergio Toral Vicente González

Piezoelectric transducers find use in NDE (nondestructive-evaluation) applications. The PVDF (polyvinylidene-fluoride) transducer has many advantages, including a wide bandwidth and high sensitivity. These transducers require high-voltage and ...

Stephen Woodward

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 ...

Marián Štofka

Autozero amplifiers have almost zero drift and input-offset values of 1 to 20 µV. You can compensate for the initial voltage offset of an auto-zero amp in sensitive circuits, such as dc amplifiers and integrators, requiring the processing of ...

Jordan Dimitrov

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, ...

Stephen Woodward

ADCs need adequate signal-acquisition analog interfaces to perform at their best. The classic general-purpose ADC front end includes multiple channels of differential input, digitally programmable gain, and track-and-hold capability. This Design ...

Stephen Woodward

Numerous and evil are the forces of darkness that conspire to frustrate accurate analog-to-digital conversion of wide-dynamic-range analog signals. Among these gremlins lurk common-mode-voltage noise and signal amplitudes too variable to fully use ...

Peter Demchenko

The circuit in Figure 1 is suited for inductive sources such as a dynamic microphone, transformer or inductance sensor/pick up. Figure 1. A simple amplifier circuit suited for inductive sources such as a dynamic microphone, transformer or ...

Dale Ouimette

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 in Figure 1 is a ...