We present a 4th-order, 3-bit, 4.3 GHz continuous-time bandpass ΔΣ modulator (CT-DSM) that can directly digitize a 1.3-GHz IF signal. We used the impulse-invariant transform to design the CT-DSM, which has a similar NTF as an idealized discrete-time modulator despite up to 1.6 clock delays in its feedback loop paths. The part was fabricated using InP HBT technology, and has a measured SNDR of 39 dB in a 200 MHz bandwidth.
|頁（從 - 到）||127-130|
|期刊||Proceedings of the Custom Integrated Circuits Conference|
|出版狀態||Published - 19 十一月 2003|
|事件||Proceedings of the IEEE 2003 Custom Integrated Circuits Conference - San Jose, CA, United States|
持續時間: 21 九月 2003 → 24 九月 2003