18604116. PHASE-LOCKED LOOP simplified abstract (Telefonaktiebolaget LM Ericsson (publ))
Contents
PHASE-LOCKED LOOP
Organization Name
Telefonaktiebolaget LM Ericsson (publ)
Inventor(s)
Aravind Tharayil Narayanan of Lund (SE)
[[:Category:Lars Sundstr�m of Lund (SE)|Lars Sundstr�m of Lund (SE)]][[Category:Lars Sundstr�m of Lund (SE)]]
Roland Strandberg of Furulund (SE)
PHASE-LOCKED LOOP - A simplified explanation of the abstract
This abstract first appeared for US patent application 18604116 titled 'PHASE-LOCKED LOOP
Simplified Explanation: The patent application describes a phase-locked loop with a voltage controlled oscillator that includes a negative resistance structure to tune the frequency of the output signal.
- The voltage controlled oscillator consists of an inductor, a capacitor, and a negative resistance structure connected in parallel.
- The negative resistance structure, made up of two transistors, allows for tuning the frequency of the output signal by adjusting a control input signal generated within the phase-locked loop.
Key Features and Innovation:
- Utilizes a negative resistance structure to tune the frequency of the output signal.
- Voltage controlled oscillator design with inductor, capacitor, and negative resistance structure.
- Control input signal generated within the phase-locked loop for frequency tuning.
Potential Applications:
- Wireless communication systems
- Frequency synthesizers
- Clock generation circuits
Problems Solved:
- Precise frequency tuning in phase-locked loops
- Enhanced stability and performance of voltage controlled oscillators
Benefits:
- Improved frequency accuracy
- Enhanced signal stability
- Versatile frequency tuning capabilities
Commercial Applications:
- Frequency modulation systems
- Telecommunications equipment
- Test and measurement devices
Prior Art: Prior art related to negative resistance structures in voltage controlled oscillators and phase-locked loops can be found in research papers and patents related to RF circuit design and oscillator technologies.
Frequently Updated Research: Research on negative resistance structures in voltage controlled oscillators and phase-locked loops is continuously evolving in the field of RF and microwave engineering.
Questions about phase-locked loops: 1. How does the negative resistance structure impact the tuning range of the voltage controlled oscillator? 2. What are the key differences between traditional voltage controlled oscillators and the design described in the patent application?
Original Abstract Submitted
A phase-locked loop comprises a voltage controlled oscillator. The voltage controlled oscillator comprises an inductor and a capacitor, connected in parallel, and also connected in parallel therewith, a negative resistance structure. A first terminal of the negative resistance structure is connected to respective first terminals of the inductor and the capacitor. A second terminal of the negative resistance structure is connected to respective second terminals of the inductor and the capacitor. The negative resistance structure exhibits a tunable capacitance, such that a frequency of an output of the voltage controlled oscillator can be tuned by a control input signal, and the control input signal is generated in the phase-locked loop. The negative resistance structure comprises first and second transistors.
