A block diagram of a sawtooth-core circuit is shown below.

下面是锯齿核电路的方框图。

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The core circuit is two stages of direct-coupled difference amplifier.

核心电路为两级直接耦合差分放大器。

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However, another significant source of drift exists outside of the core circuit proper.

然而，另一个值得注意的漂移来源则来自于核心电路之外。

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Its location near the geographic centre of the US, a world-class airport and a rash of recent hotel developments in its pedestrian-friendly core have combined to make Denver an increasingly regular stop on the business travel circuit.

BBC: Business trip: Denver