Issue: 16 - 22 Dec, 2009
Posted: 09:22 16 Mar 2010
Posted: 09:00 02 Mar 2010
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Posted: 09:30 22 Jan 2010
Posted: 10:25 21 Jan 2010
Posted: 10:08 15 Jan 2010
Posted: 09:06 11 Jan 2010
Posted: 09:00 08 Jan 2010
Posted: 12:00 05 Jan 2010
Posted: 10:33 15 Dec 2009
Posted: 10:05 14 Dec 2009
Class B amplifiers are prone to crossover distortion, which occurs in the output stage in which conduction transfers from one transistor to the other. To prevent crossover distortion, a bias current must flow in both transistors simultaneously. The bias current prevents both transistors from turning off in the transition region.
28 Oct 2009
A previous Design Idea uses a three-decade BCD (binary-coded-decimal) DAC to precisely set the output current of a current source (Reference 1). The circuit acts as a code-to-conductivity converter.
26 Feb 2010
Many people with significant physical disabilities can't operate everyday mechanisms, such as TV remote controls. To make matters worse, adaptive technologies are often unaffordable unless insurance covers them.
05 Jan 2010
The need for timing in embedded programming often exceeds the small number of available hardware timers in microcontrollers. For example, the Microchip PIC16F84A has one timer, but you can create as many as eight timers with the Timers8.inc assembly code.
16 Mar 2010
Sometimes, you need to read the status of pushbuttons that are as much as 5m away from your electronic circuit. That task is easy if you have just one button.
30 Sep 2009
When driving an H-bridge or a similar circuit, you usually must ensure that two or more transistors are not on at the same time. Eliminating multiple transistors from turning on reduces power consumption and lowers EMI (electromagnetic interference). Crossover-delay circuits solve that problem.
15 Feb 2010
CMOS image sensors include the colour filters of an RGB (red/green/blue) Bayer array, which lets the sensor detect colours. The image data, the output from the image sensor, is Bayer raw data (Figure 1). Unfortunately, most consumer-grade image-displaying devices require an RGB-image-data format with red, green, and blue in each pixel’s data.
02 Mar 2010
Use a short-wave infrared camera to capture the image of an entire wafer.
04 Dec 2009
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