A programmable switched-capacitor sinewave generator

Abstract

A new switched-capacitor topology is presented to realize a sinewavc. generator. The circuit architecture is simple and is suitable for monolithic realization. The peak amplitude as well as the frequency of the sinusoid are digitally programmable.The frequency is independent of circuit parameters, and it depends directly on the clock frequency and thus provides stability a well as accuracy. Stability in the peak amplitude is provided by a stable external dc source. Breadboard testing of the circuit has given harmonic distortion of less than 35 dB with 25% capacitors. Distortion has been reduced to less than 45 dB when the capacitors are adjusted closer to the design values.

Analog Sinewave Signal Generators for Mixed-Signal Built-in Test Applications

“…Analog test stimulus generation for BIST applications continues to be a hot topic in the test research community, and a number of different strategies for analog signal generation have been published for the last years [4]- [10], [12]- [17].…”

Practical implementation of a network analyzer for analog BIST applications

“…There are several works on the generation of sinewave signals, [8]- [12]. A classical solution is the analog oscillator composed by a filtering stage and a non-linear feedback mechanism [10].…”

“…In [1] the authors extended and improved the works in [8] and [12] to present a high performance solution very suitable for BIST applications as the required circuitry is mainly reduced to the unavoidable filter and a very simple digital control circuitry. Fig.2 shows the generator schematic.…”

Practical Implementation of a Network Analyzer for Analog BIST Applications

“…There are several works on the generation of sinewave signals, [8]- [12]. A classical solution is the analog oscillator composed by a filtering stage and a non-linear feedback mechanism [10].…”

“…In [1] the authors extended and improved the works in [8] and [12] to present a high performance solution very suitable for BIST applications as the required circuitry is mainly reduced to the unavoidable filter and a very simple digital control circuitry. Fig.2 shows the generator schematic.…”