Time & Frequency Articles
Frequency Synthesis and Conversion
Two Diode Odd-Order Multiplier
PLLs using ULN Oscillators Includes info on Type-2 loops.
Switching Diode Frequency Doublers (pdf, 66k)
Unusual Frequency Dividers (pdf, 35k)
HCMOS Gates Make Frequency Multipliers (pdf, 27k)
Choosing a Frequency Multiplier’s Waveform (pdf, 32k)
Frequency Tripler using the CA3028 (pdf, 15k)
Simple Divide-By-N using ‘161s ( pdf, 9k)
A Sub-Picosecond Phase Stability Frequency Multiplier
Phase Noise/ AM Noise
Frequency Difference Divider The opposite of a frequency difference multiplier?
Low-Cost Phase Noise Measurement
Phase Noise, Harmonics and Sub-Harmonics
Low Noise Amplifier for Phase Noise Measurements (pdf, 33k) Features less input noise than a 50 ohm resistor.
Audio Noise Sources for Generating Phase Noise Generate white and flicker noise.
Low Phase Noise Systems – Hints and Tips
VHF Oscillator and Multiplier AM Noise
Oscillator Circuits
Tiny Crystal Oscillator (pdf, 13k) High-stability gate oscillator uses two, 5-pin SOT packaged devices.
Low Distortion Crystal Oscillator (pdf,19k)
Power Supply Circuits
Cockcroft-Walton Diode Voltage Multipliers (pdf, 36k)
RF Amplifier Circuits
One Watt Class-C Amplifier (pdf, 11k)
RF Misc. Circuits
Bootstrapped PLL Improves Oscillator Performance (pdf, 33k)
RF Isolator Uses Differential Amplifiers
Shock and Vibration
Vibration-Induced Phase Noise & Vibration Isolation Systems includes links to spreadsheets for vibration calculations.
Reducing Vibration Induced Phase Noise – Some Research Ideas