Cross-Coupled Frequency Multiplier Circuit for Higher Conversion Gain
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Solution Overview
Problem
Existing frequency generators in electronic devices struggle to efficiently generate various frequencies, particularly millimeter waves, due to difficulties in integrating multiple frequency generators, leading to challenges in high integration and performance demands.
Innovation Solution
A frequency multiplier circuit incorporating cross-coupled capacitors and transistors to enhance frequency conversion gain without additional power consumption, utilizing capacitors connected to transistor gates to increase effective input voltage and transconductance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple frequency generators are mounted to generate various frequencies, then frequency versatility is improved, but device complexity and integration difficulty increase
Solution Approach 1:
The patent implements a single frequency generator that can produce multiple output frequencies by incorporating multiple output nodes (first output node, second output node, third output node) within the same generator circuit. This allows one generator to perform the work of multiple generators, achieving frequency versatility without increasing device complexity or integration difficulty
2Adaptability or versatility
If frequency multiplication is used to generate millimeter wave signals, then frequency versatility is improved, but signal loss increases
Solution Approach 1:
The frequency generator is divided into multiple independent output nodes (first output node connected to first frequency output, second output node connected to second frequency output, third output node connected to third frequency output). Each node can independently provide frequency signals at different multiplication levels, allowing the system to achieve frequency versatility while minimizing signal loss by selecting the appropriate output node for the required frequency
Data Source
AI summary
A frequency multiplier includes a capacitor circuit having a plurality of capacitors therein, and is responsive to a differential input signal applied to an inverting input node and a non-inverting input node thereof. A frequency multiplication circuit (FMC) is provided, which has a plurality of transistors therein. The FMC is configured to receive components of the differential input signal passing through the plurality of capacitors, and multiply a frequency of the components of the differential input signal. A plurality of inductor loads are provided, which are connected to an inverting output node and a non-inverting output node of the FMC, and are configured to convert a current signal generated by the FMC into a voltage signal.