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Ecliptek Corporation cordially invites you to attend a
Frequency Control Technical Seminar
Presented By
Ecliptek's Vice President of Engineering,
Mr. Tom Culhane
| Who Should Attend? | |
| Design Engineers Component Engineers Application Engineers Quality Engineers |
|
When: |
|
| Wednesday, September 24, 2003 Lecture: 10:30 AM to 1:00 PM (Buffet Lunch Included) Q & A Session: 1:00 PM to 1:30 PM |
|
Where: |
|
| Santa Clara Hilton 4949 Great America Parkway Santa Clara, California 95054 |
|
RSVP: |
|
| seminar@ecliptek.com | |
About the Speaker: |
|
| Thomas Culhane is the Vice President of Engineering for Ecliptek Corporation. He has a BSEE from Marquette University and has been in the frequency control industry for 17 years. If you have pre-seminar questions, please send them to seminar-questions@ecliptek.com. | |
The following is a complete listing of subjects that will be covered (course materials provided):
Section I: Crystal Unit Product and Theory
- Progress in time keeping
- Quartz history
- What is quartz? Why quartz?
- Crystal "Q"
- Piezoelectric effect
- Acoustic wave resonators; SAW vs. BAW
- BAW: modes of vibration and cuts
- Modes of operation: AT cut crystal thickness
- Modes of operation: BT cut crystals
- Crystal vibration: Ideal resonator
- Crystal drive level - Drive level dependence
- Drive level: Crystal activity dips
- Crystal: Mechanical equivalent
- Crystal equivalent circuit
- Reactance curve of a quartz crystal
- Crystal motional capacitance (C1)
- Crystal motional inductance (L1)
- Crystal shunt capacitance (Co)
- Equivalent series resistance (ESR)
- Center frequency, Frequency tolerance
- Frequency stability
- Frequency versus temperature
- Factors of frequency stability
- Type of cut: Frequency vs temperature
- Frequency tolerance / stability - an example
- Crystal and oscillator aging
- Crystal and oscillator aging specifications
- EC Series (HC-49/U)
- HC-49/US: AT strip resonator
- ESR: HC-49/US vs. HC-49/UP
- Packaging trends
- 2 and 4 pad plastic and ceramic SMD
- Resonance reactance curve of a quartz crystal
- Series versus parallel resonance
- Load capacitance versus frequency change
- Capacitance ratio
- How to specify a VCXO crystal
- Crystal for clock recovery: an example
Section II: Oscillator and Crystal Manufacturing
- Autoclave: growing crystals
- Production processes: Start to Finish
Section III: Oscillators: Product and Theory
- Types of oscillators
- Stability: hierarchy of oscillators
- Packaging trends: DIP, plastic, and SMD
- Voltage controlled crystal oscillators (VCXO)
- PLL Applications
- Packaging trends: DIP and 6 pad SMD
- TCVCXO's and TCXO compensation
- Logic families
Section IV: Pierce On-Board Oscillator Design
- Discrete oscillator vs. on-board oscillator?
- Amplifier gain, Loop gain
- Oscillation barkhausen criteria
- Positive reactance oscillator: Phase shift
- Positive reactance oscillator: ASIC
- Amplifier characteristics
- Measuring amplifier output impedance
- Pierce oscillator: feedback resistor
- Series versus parallel resonance
- Crystal load capacitance: Gain
- Output impedance
- Crystal power dissipation
- PCB layout considerations
- Oscillator design review