Back to Analog
345 results found, displaying items 141 - 160
MOSFET Circuit Forms Reliable Switch Debouncer
Mechanical switches can be noisy, generating multiple transient pulses that may cause faulty operation of fast digital circuits. In this design, a pair of MOSFETs are used in a monostable mode to quench the switch-bounce pulses. The switch...
Simple Circuit Controls Pulse Transition Rates
Some applications require that pulse transition rates be controlled to minimize distortion and crosstalk in subsequent systems. The choice of active filtering generally results in elaborate and expensive designs, especially because good transient...
Instrumentation Amplifier Simplifies Audio Distortion Tests
A critical measure for all audio components is distortion, typically specified as total harmonic distortion (THD) or total harmonic distortion + noise (THD+N). THD is defined as: ...
Low-Cost Audio Delay Line Uses 1-Bit ADC
The concept of an audio delay line is simple. The voice or music to be delayed is analog-to-digital converted and fed into a shift register or any digital delay or storage medium. The delayed (or playback) digital signal is fed into a...
Get Extra Op Amps By Using Spare Comparators
So, you have selected an MCU with an analog-to-digital converter (ADC) and analog comparator peripherals for your cost-sensitive application. You then realize that your sensor signal needs to be...
RFI-Free Ringer Generator Works Off Single 5-V Supply
A simple yet effective circuit to generate a POTS-compatible ringing voltage can be made from National Semiconductor's LM4871 audio-amplifier IC and a dozen passive components (see the figure). This...
D-Type Flip-Flop Synchronizes Multiplexer Data
Multiplexers are widely used in communication systems to convert parallel signals into serial signals. The multiplexer takes a high-frequency clock as the system input clock (Clk_in) that's synchronized with the serial output data. A low-frequency...
Use Wideband Op Amps In Single-Supply Applications
Most wideband op amps are easiest to use with split supplies. But they can be effectively employed in single-supply circuits. The big hurdle to overcome is keeping the inputs and outputs biased to mid-rail while maintaining a low-impedance node to...
Make A Dual ECL Latch Function As A Dual R-S Flip-Flop
The MC1030 is a clocked dual D-type latch. Any change in the D input will be reflected at the output while the clock is low. The outputs are latched on the clock's positive transition. Also, this device features set and reset inputs that don't...
Bypass Switch Speeds Up Data Through Daisy Or JTAG Chain
A daisy chain consisting of multiple devices can be quite cumbersome to control, especially when the only device that needs updating is the last one in the chain. Each device in the chain must be written to, resulting in a slow update rate. It's...
Handy Circuit Simplifies Frequency-Ratio Measurement
In many instrumentation systems, the ratio of two frequencies has more significance than the two individual frequencies. One such application is the ratiometric capacitive sensor. In this case, two frequencies, F1 and F2, are generated inversely...
Two Triggers Have Flexible Time Intervals And Pulse Widths
Generating two independent pulse triggers separated by a certain time delay can be handy in half-bridge drivers and thyristor-commutated lamp flashers. Time delay is set to avoid overlapping of the power switches' ON states or to minimize the stress...
Analog Voting Circuit Is More Flexible Than Its Digital Version
Majority voting systems are used to protect critical plants and processes. Such systems find applications in chemical, power, nuclear, and aerospace industries. Here, multiple sensors monitor a critical parameter, and the readings of, say, two...
Simple Scheme Lowers Harmonic Distortion Of Transformers
Figure 1a illustrates a typical transformer having a primary to secondary turns ratio of 1:N and a primary inductance of LP. In the real world, however, transformers aren't ideal, and they can...
Expand Your I/O With The I²C Bus
In system applications where various input signals are monitored or several output signals are controlled, these lines are sometimes connected directly to the microprocessor pins. Such monitoring and controlling is done in software. However, this...
Hot-Swap Controller Makes Adjustable Circuit Breaker
Medium- and high-voltage systems that range from 9 to 72 V often require one or more of the following circuit capabilities: hot-swap control, circuit-breaker fault protection, and inrush current limiting. Without R4, the circuit shown in ...
Random-Number Generator Auto-Balances Its Bit Output
The "white noise" generator supplies one of the simplest methods for producing random data with hardware. To convert this noise to logic levels, many designs use a standard logic gate and fish around for the gate input threshold by injecting the...
RS-422 Repeater Draws Less Than 3 µA Of Standby Current
The RS-422 interface represents an excellent choice for communicating in noisy environments and over a distance. But when the distance exceeds the RS-422 capability for reliable data transfer, adding a repeater is mandatory. The repeater circuit of...
Low-Cost Circuit Controls PM DC-Motor Speed
The motor-speed-control circuit in the figure shows an SG3524 pulse-width-modulation (PWM) IC, U2, driving the high side of a motor through a p-channel FET, Q1. The motor terminal voltage is more easily...
Protect Your Microphone Pre-Amp Against Overload
Typically, microphone pre-amplifiers for consumer electronics are designed in one of two ways. In Figure 1a, the microphone gain is set high to accommodate low-level signals and the output is attenuated as...
 prev. page
1
2
3
4
5
6
7
[8]
9
10
11
12
13
14
15
16
17
18
next page 
|
