Signal Processing in Circuit Board Cloning
Today’s signal processing in Circuit board cloning system generally require mixed-signal devices such as analog-to-digital converters (ADCs) and digital-to-analog converters (DACs) as well as fast digital signal processors (DSPs). Requirements for processing analog signals having wide dynamic ranges increase the importance of high performance ADCs and DACs.
signal processing in circuit board cloning
Maintaining wide dynamic range with low noise in hostile digital environments is dependent upon using good high speed circuit design techniques, including proper signal routing, decoupling, and grounding.
In the past, “high precision, low speed” circuits have generally been viewed differently than so-called “high speed” circuits. With respect to ADCs and DACs, the sampling (or update) frequency has generally been used as the distinguishing speed criteria.
However, the following two examples show that in practice, most of today’s signal processing IC are really “high speed,” and must therefore be treated as such in order to maintain high performance. This is certainly true of DSPs, and also true of ADCs and DACs.
All sampling ADCs (ADCs with an internal sample-and-hold circuit) suitable for clone circuit board signal processing applications operate with relatively high speed clocks with fast rise and fall times (generally a few nanoseconds) and must be treated as high speed devices, even though throughput rates may appear low. For example, a medium speed 12-bit successive approximation (SAR) ADC may operate on 10-MHz internal clock, while the sampling rate is only 500 kSPS.
