| IP명 | A High-Order N-Path channel-Selection LNA for Adbanced 5G NR FDD RX | ||
|---|---|---|---|
| Category | Analog | Application | Cellular |
| 실설계면적 | 2.5㎛ X 2.5㎛ | 공급 전압 | 1.2V |
| IP유형 | Hard IP | 동작속도 | 2ㅎHz |
| 검증단계 | Silicon | 참여공정 | SS28-2501 |
| IP개요 | This article presents a channel-selection (CH-SEL) low-noise amplifier (LNA) employing a main common-source amplifier path and high-order N-path feedforward (FF) blocker cancellation path for advanced cellular applications. The proposed FF path comprises a mixer-first receiver (RX) using a baseband (BB) amplifier with combined negative and positive capacitive feedback, BB G -stage, BB high-pass filter, and m current-mode up-conversion mixer. This FF path provides input power matching and exhibits fourth-order N-path bandpass filtering with BB complex poles at the LNA input and additional notch filtering at the LNA output. It has a higher Q-factor than second-order N-path filtering with a BB real pole, achieving a flat pass band and improved selectivity with the same 3 dB bandwidth at both the input and output of the LNA. The proposed CH-SEL LNA enhanced the blocker tolerance and linearity of 5G new radio (NR) frequency division duplexing primary and diversity RXs. |
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