This paper introduces a simple variable gain amplifier (VGA) structure that shows an inherently dB-linear gain control property. Requiring no additional components for dB-linear control, the structure is compact and power efficient. The designed two-stage VGA shows a gain control range of 60dB with the gain error in the range of ±0.4 dB. The power consumption including the output buffer is 20.4...

The performance of optimising compilers crucially depends on the availability of controlflow information at compile time. For any first-order imperative program, such information is available via a flowchart constructed from the program text. Consequently, traditional dataflow analyses can be used to perform a series of compile-time program optimisations (Aho et al. 1986). For higher-order prog...