8 GHz Tunable CMOS Quadrature Generator using Differential Active Inductors
Bibliographic record
Abstract
The design and implementation of a new 8 GHz tunable quadrature generator using a differential active inductor embedded in the local oscillator buffer are presented. The design has a much smaller form factor compared to the sequence asymmetric polyphase filter used as quadrature generator. It relaxes the coupling between the tuning of the output signal amplitude and quadrature phase and facilitates the application of automatic gain and phase control circuitry to compensate for process and temperature variations. It eliminates the need for additional buffering stages at the output of the quadrature generator and results in a considerable reduction in power consumption. A prototype implemented in 0.18 /spl mu/m CMOS technology, operating from a 1 V power supply and consuming 12 mW of power, features a measured gain of -2 dB and a worst case phase and amplitude mismatch of better than 1.5/spl deg/ and 1 dB respectively over a bandwidth of 100 MHz at 8 GHz. The design meets the potential specifications of 4G OFDM direct conversion receivers.
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How this classification was reachedexpand
Full frame machine prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.
Distilled classifier scores by category (both heads)
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.001 | 0.001 |
| Open science | 0.002 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.002 | 0.001 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one source (direct Gemma or distilled Codex), not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".