Transistor-Inductor Frequency Doubler for Wideband Low-Power RF
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Solution Overview
Problem
High-frequency wireless communications require advanced manufacturing processes, increasing production costs and making it difficult and costly to maintain bandwidth for wideband communications.
Innovation Solution
A frequency doubler circuit comprising transistors and inductors that multiply the oscillating frequency of in-phase and inverse oscillating signals, providing improved signal amplification and bandwidth while reducing power consumption and operational voltage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If advanced manufacturing processes are used for high frequency communications, then communication frequency is improved, but production cost increases
Solution Approach 1:
The patent changes the operating parameters of existing transistors to achieve frequency doubling functionality. By configuring standard transistors to operate in specific modes with appropriate biasing and signal routing, the system achieves higher frequency output without requiring specialized high-frequency transistor manufacturing processes.
Solution Approach 2:
The frequency doubler circuit uses standard transistors that can serve multiple functions - acting as switches, amplifiers, and frequency multipliers within the same circuit. This multi-functionality allows existing components to achieve high-frequency performance without requiring dedicated high-frequency manufacturing processes.
2Adaptability or versatility
If advanced manufacturing processes are used for wideband communications, then bandwidth is improved, but production cost increases
Solution Approach 1:
The patent achieves wideband operation by adjusting circuit parameters such as transistor sizing, biasing conditions, and inductor values. These parameter changes enable standard components to operate across broader frequency ranges, providing wideband communication capability without expensive specialized manufacturing.
Solution Approach 2:
The frequency doubler employs dynamic operating conditions where transistors switch between different states during operation. This dynamic behavior allows the circuit to maintain performance across varying frequencies and bandwidth requirements using standard components rather than fixed high-frequency designs.
3Speed
If frequency multiplication is implemented, then output frequency is improved, but power consumption increases
Solution Approach 1:
The frequency doubler utilizes periodic switching action of transistors synchronized with the input signal frequency. By confining current flow to specific periodic intervals during transistor switching cycles, the circuit generates frequency-doubled output while minimizing continuous power dissipation that would occur with linear amplification approaches.
Solution Approach 2:
The patent replaces traditional high-power linear frequency multiplication methods with a switching-based approach. By using transistors as electronic switches rather than linear amplifiers, the system achieves frequency multiplication with significantly reduced power consumption, as switching operations dissipate far less energy than continuous linear amplification.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The frequency doubler achieves efficient signal amplification, expanded bandwidth, and low power consumption, enabling cost-effective transmitters and receivers for high-frequency communication systems without the need for expensive manufacturing processes.
Implementation Method 1
The first inductor couples the second terminal of the first transistor to the output terminal of the frequency doubler. The second inductor couples the second terminal of the second transistor to the output terminal of the frequency doubler.
Data Source
AI summary
A frequency doubler receiving an in-phase oscillating signal and an inverse oscillating signal and generating an output signal oscillating at a multiplied frequency, accordingly. The frequency doubler has a first transistor, a second transistor, a first inductor and a second inductor. A first terminal of the first transistor and a first terminal of the second transistor are at a common voltage. The frequency doubler receives the in-phase oscillating signal and the inverse oscillating signal via control terminals of the first and second transistors. The first and second inductors couple a second terminal of the first transistor and a second terminal of the second transistor to an output terminal of the frequency doubler, respectively. The first and second inductors may be separate inductance devices or, in another case, be implemented by a symmetric inductor.