AN75 - Circuitry for Signal Conditioning and （AN75信号调节电路,）.pdf

Application Note 75 March 1999 Circuitry for Signal Conditioning and Power Conversion Designs From a Once Lazy Sabbatical Jim Williams Introduction here are refinements or adaptations of previous efforts, although some are new. Also included, and annotated as Linear Technology has a sabbatical program. Every five such, are other authors’ works that seemed appropriate. years employees are granted sabbatical leave, which may last up to six weeks. You have 18 months from each five This publication’s title is cursorily descriptive of its con- year employment anniversary to take the leave. Sabbatical tents. A more studied accounting includes categories of is fully company paid and has no restrictions. The time is data converters and signal conditioners, transducer cir- yours to do with as you please. cuits, oscillators and power converters. They begin imme- diately. People exercise all degrees of freedom with their sabbati- cals. They go sailing, they go to South Sea islands, they ski Micropower Voltage-to-Frequency Converters some mountain nobody ever heard of, they trek in Nepal. Houses get fixed, cars restored and children played with. Figure 1 is a voltage-to-frequency converter. A 0V to 5V input produces a 0Hz to 10kHz output, with a linearity of For my third sabb