Схемы - Аналоговая схемотехника - 9

Scot Lester

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 ...

Lyle Williams

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 ...

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, ...

C Rajan

Resonant power supplies are popular because of high efficiency, low noise, and compactness. You can implement a resonant buck or boost converter using a single switch. The regulation of the output in such a converter derives from using a constant ...

W Dijkstra

Sometimes, the need arises for a short-circuit tester that supplies a low current to the device under test (DUT) and also uses voltages lower than 100 mV to prevent conduction of semiconductors. The circuit in Figure 1 meets these requirements. R 1 ...

Chris Toliver

Some voltage references can be used as shunt regulators, either by tying V IN and V OUT together or by leaving V IN open. These devices are limited to low currents, however, with a typical limit of around 10 mA. Standard Zener diodes serve the same ...

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

Figure 1 shows how a Sallen-Key high pass filter (HPF), can be switched on/off using only one extra transistor and resistor. Figure 1. A Sallen-Key HPF filter topology that can be switched on/off using an extra transistor and resistor. This ...