VCO Design - University Of Maryland

VCO Design - University Of Maryland

VCO Design Z. Dilli, Mar 2012 VCO Design Adapted from Ryan J.

Kier, Low Power PLL Building Blocks, Ph.D. Dissertation, U. of Utah, 2010.

System Design VCO Source follower (external bias) Differential Amplifier (external bias) Inverter chain Simulations show a center frequency of around 1 GHz, instead of 433 MHz as designed in the

referenced dissertation No varactor parasitics considered; bias voltage unknown Around 4.3% tunability with certain assumptions about inductor parasitics Varactor trade-off: Too small reduces tunability

range; too large prevents oscillation VCO-only Outputs Cvaractor varying from 160 fF (f=1.0737 GHz) to 450 fF (f=1.0385 GHz) Tuning range wider at lower bias currents (affects MOSFET capacitance)

VCO-only Outputs Ibias changing from <1 mA to >3 mA (by changing Vbias from 1 V to 3 V) Source-follower and Self-biasing Differential Amplifier

Two source followers for the differential outputs of the VCO, designed not to load the VCO

output with excess capacitance Self-biasing DA increases output swing for the inverter chain

operating more reliably Single-ended output taken out of DA SF and SBDA operation

Cvaractor=160 fF, f=1.0737 GHz Inverter Chain Designed to drive a 1.5 pF load

This is difficult with a full swing with this CMOS technology (0.6 um minimum width) at > 100s of MHz frequencies Inverter Chain Output to 0.3 pF Load Inverter Chain Output to 1.5 pF Load

VCO Layout Full Chip Layout

Recently Viewed Presentations

  • Commission to Eliminate Child Abuse and Neglect Fatalities:

    Commission to Eliminate Child Abuse and Neglect Fatalities:

    Commission to Eliminate Child Abuse and Neglect Fatalities: Discussing the recommendations. David Sanders, Ph.D. Executive Vice President of Systems Improvement, Casey Family Programs "Since 2012, directors of at least 16 state and county agencies have resigned or been fired. Nine...
  • 1 Copyright  2011, Oracle and/or its affiliates. All

    1 Copyright 2011, Oracle and/or its affiliates. All

    Bruce Lowenthal, Director of Security Alerts, OracleEric Maurice, Director of Software Security Assurance, Oracle. Moscone South. ... PowerPoint Presentation Description: This presentation contains information proprietary to Oracle Corporation
  • Human Infection with a Novel Avian-Origin Influenza A (H7N9 ...

    Human Infection with a Novel Avian-Origin Influenza A (H7N9 ...

    Antibiotic Selection Pressure and Resistance in . Streptococcus . pneumoniae. and . Streptococcus . pyogenes. From Figure 1. Total antibiotic use in the outpatient setting (vertical axis) versus prevalence of penicillin-nonsusceptible. Streptococcus. pneumoniae (horizontal axis) in 20 industrialized countries. A....
  • PSYC2150 Personality Psychology - Neo-Freudian Theory ...

    PSYC2150 Personality Psychology - Neo-Freudian Theory ...

    Sex offenders are a heterogeneous group, and even people who commit similar offence types have individual variability and require thoughtful case formulation . Good assessment is comprehensive and covers . multiple domains (Trauma, personality, mental health, sex deviance, IQ, and...
  • VAW120 UNIT EVALUATION PREPARATION NATOPS JACKETS & FLIGHT

    VAW120 UNIT EVALUATION PREPARATION NATOPS JACKETS & FLIGHT

    LT Rob "Brucie" Thompson. ... TAB B. PCS Orders. ... CRM Flight needs to specify: DATE of flight, DATE of Expiration and A/C Model. A/C Model is commonly left out. Additionally, Model, not Series (E-2 instead of E-2C) is correct.
  • CALL (Computer assisted language learning) and its use in ...

    CALL (Computer assisted language learning) and its use in ...

    CALLComputer Assisted Language Learning and Its Use in Reading Instruction for Low Proficiency ELLs. ... The Internet TESL Journal, 6(12). Retrieved from ... (Computer assisted language learning) and its use in reading instruction for low proficiency ELL's
  • 1st4sport Level 1 Award in Coaching Football (QCF)

    1st4sport Level 1 Award in Coaching Football (QCF)

    * Forging ahead Striving to keep up Coping Dealing with Differentiation Applying the STEP principle to meet the needs of the individual Space Task Equipment People Safety Tutor Consolidation - Exemplar delivery Warm Ups On guard See it do it...
  • Corporate IP Assets &amp; Sustainability

    Corporate IP Assets & Sustainability

    International Innovation Index, produced jointly by the Boston Consulting Group, the National Association of Manufacturers, Bloomberg Innovation Index and the World Economic Forum's Global Competitiveness Report both look at innovation among other criteria. There are also a myriad of other...