Switched-Capacitor Transmitter With Inductive Voltage Combining
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Solution Overview
Problem
Traditional analog power amplifiers in electronic transmission systems consume high power, leading to inefficiencies and increased energy demands in wireless communication devices.
Innovation Solution
The implementation of switched capacitor transmitter circuits with inductive power combining networks, which use capacitors and inductors to convert digital data into analog signals efficiently, reducing power consumption by combining voltages from multiple transmitter circuits to produce a combined voltage output.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If traditional analog power amplifiers are used for signal transmission, then the transmission power is sufficient, but the power consumption is high
Solution Approach 1:
The patent replaces traditional analog power amplifiers with a switched-capacitor-based digital-to-analog converter system. This substitution uses capacitive switching and inductive combining instead of continuous analog amplification, fundamentally changing the mechanism from analog signal processing to digital-like switching operations, thereby reducing power consumption while maintaining transmission capability
Solution Approach 2:
The switched-capacitor circuit operates by periodically charging and discharging capacitors at switching nodes. This periodic action allows the circuit to build up voltage through repeated charge transfer cycles rather than requiring continuous high-power amplification, enabling efficient power delivery through time-averaged effects
2Use of energy by moving object
If switched capacitor circuits are used to convert digital data to analog signals, then power consumption is reduced, but voltage output may be insufficient
Solution Approach 1:
The patent combines voltage outputs from multiple switched-capacitor transmitter circuits through an inductive power combining network. The inductors merge the individual voltage signals constructively, achieving a combined voltage output that is sufficient for transmission while each individual circuit operates at lower power consumption levels
3Power
If multiple transmitter circuits are combined to increase voltage output, then the voltage is sufficient, but circuit complexity increases
Solution Approach 1:
The inductive power combining network serves multiple functions simultaneously: it combines voltage outputs from multiple circuits, provides impedance transformation, and enables power summation. This multi-functionality reduces the need for additional separate components, managing circuit complexity while achieving sufficient voltage output
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
This approach significantly reduces power consumption and enhances efficiency in wireless transmission systems by minimizing switching losses and optimizing power supply voltage, achieving improved performance in terms of signal-to-distortion ratios and out-of-band spurious emissions.
Implementation Method 1
a first plurality of capacitors switchably coupled between a power supply terminal and a reference voltage terminal
Implementation Method 2
an inductive power combining network including a plurality of inputs coupled to a plurality of outputs of the plurality of switched capacitor transmitter circuits
Data Source
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AI summary
The present disclosure includes switched capacitor transmitter circuits and methods. In one embodiment, the present disclosure includes a plurality of switched capacitor transmitter circuits coupled to inputs of an inductive network. The inductive network combines voltages from the switched capacitor transmitter circuits to produce a combined voltage on an output. In another embodiment, a digital data signal is thermometer encoded and a negative thermo-encoded signal is bit order reversed to control capacitors in a switched capacitor transmitter circuit.