Integrated Multi-Mode RF Transceiver With Low-Voltage Switches
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Solution Overview
Problem
Existing RF transceivers for wearable devices face challenges with increased printed circuit board area, power consumption, and manufacturing costs due to external switch devices, which are not suitable for high-volume, low-cost production.
Innovation Solution
An integrated RF transceiver design with a receive path, a low power transmit path, and a high power transmit path, where switches are integrated within a single circuit, allowing for configurable operation modes and reduced power consumption by using low voltage n-type field effect transistors for switches and high voltage transistors for amplifiers, with a balun and capacitors for impedance matching.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If an external switch device is used to configure RF transmit and receive paths, then the transceiver can achieve multi-mode operation, but the printed circuit board area increases
Solution Approach 1:
The patent integrates the switch device and amplifier circuits into a single integrated circuit chip, merging multiple previously separate components (external switch, LNA, power amplifiers) into one unified device. This consolidation eliminates the need for separate external switch components and reduces the overall PCB area required for implementing multi-mode RF transceiver functionality.
2Adaptability or versatility
If an external switch device is used to configure RF paths, then the transceiver can switch between transmit and receive modes, but the power consumption increases
Solution Approach 1:
The integrated circuit combines the switch device with amplifier circuits in a unified architecture, allowing for more efficient power management. The circuit can selectively activate only the necessary components (switch, LNA, or power amplifier) based on whether transmit or receive mode is required, reducing overall power consumption compared to having separate external components that would all remain powered.
3Adaptability or versatility
If an external switch device is used for RF path configuration, then the transceiver can be reconfigured for different frequency bands, but the manufacturing costs increase
Solution Approach 1:
The patent integrates multiple functions (switching, low noise amplification, power amplification) into a single integrated circuit, reducing the total component count and assembly complexity. This integration lowers manufacturing costs by eliminating the need to source, test, and assemble multiple separate external components, while maintaining the ability to reconfigure for different frequency bands through integrated control circuitry.
4Adaptability or versatility
If separate external components are used for RF transmit and receive paths, then the transceiver can be designed with modular architecture, but the device complexity increases
Solution Approach 1:
The patent consolidates multiple discrete external components (switch device, LNA, power amplifiers) into a single integrated circuit, reducing the number of external components and interconnections required. This integration simplifies the overall device architecture by reducing the complexity of component interconnections and external signal routing, while maintaining modular functionality through integrated sub-circuits.
Data Source
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Figure 2A~2B
AI summary
A wireless transceiver includes a receive path having a first switch and configured to receive an input signal when the first switch is in an open position, a first transmit path having a second switch and configured to provide a first output signal when the second switch is in a closed position and the first switch is in a closed position, and a second transmit path having a third switch and configured to provide a second output signal when the third switch is in a closed position, the first switch is in the closed position, and the second switch is in an open position. The first, second, and third switches are integrated together with the receive path, the first RF transmit path, and the second transmit path within a same integrated circuit.