ASK BPSK Wireless Transmission Circuit Design
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Solution Overview
Problem
Existing wireless transmission devices require large-scale circuits and high power consumption to handle both amplitude-shift keying (ASK) and binary phase-shift keying (BPSK) modulation modes, leading to increased circuit size and power consumption due to the need for complex signal conversion and amplification processes.
Innovation Solution
A wireless transmission device and method that includes a modulation designation reception circuit, a signal generation circuit, an amplitude control signal generation circuit, a polarity reversal circuit, and an amplifier circuit to generate and transmit ASK or PSK signals, using a class-C amplifier circuit to reduce power consumption and circuit size by controlling amplification based on signal levels and modulation modes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If complex signal conversion and amplification processes are used to handle both ASK and BPSK modulation modes, then modulation versatility is improved, but circuit size increases
Solution Approach 1:
The patent combines ASK and BPSK modulation functions into a single integrated circuit architecture. The D/A converter, mixer, adder, and amplifier are merged into one unified signal path that can handle both modulation types through selective signal routing and processing, eliminating the need for separate dedicated circuits for each modulation mode.
Solution Approach 2:
The transmission circuit is designed with universal components that can perform multiple functions. The mixer can operate in both amplitude modulation mode (for ASK) and phase modulation mode (for BPSK), and the amplifier can provide both linear amplification and envelope tracking, making the entire system multi-functional without requiring separate dedicated circuits.
2Adaptability or versatility
If complex signal conversion and amplification processes are used to handle both ASK and BPSK modulation modes, then modulation versatility is improved, but power consumption increases
Solution Approach 1:
The patent combines ASK and BPSK modulation functions into a single integrated circuit architecture. The D/A converter, mixer, adder, and amplifier are merged into one unified signal path that can handle both modulation types through selective signal routing and processing, eliminating the need for separate dedicated circuits for each modulation mode.
Solution Approach 2:
The patent employs envelope tracking that dynamically adjusts the amplifier's operating point based on the signal envelope. This periodic modulation of the amplification level allows the system to use high power only when needed for signal transmission and reduce power during transitions or idle periods, optimizing overall power efficiency.
3Reliability
If a linear amplifier circuit is used to avoid waveform distortion, then signal fidelity is improved, but power efficiency decreases
Solution Approach 1:
The patent employs envelope tracking that dynamically adjusts the amplifier's operating point based on the signal envelope. This periodic modulation of the amplification level allows the system to use high power only when needed for signal transmission and reduce power during transitions or idle periods, optimizing overall power efficiency.
Solution Approach 2:
The patent changes the operating parameters of the amplifier dynamically through envelope tracking. By adjusting the bias point and gain of the amplifier in real-time according to the signal characteristics, the system maintains linear operation and signal fidelity when required while improving power efficiency by avoiding continuous operation at maximum power levels.
Data Source
AI summary
A wireless transmission device includes a reception circuit that receives a ASK or PSK designation signal designating amplitude-shift keying (ASK) or phase-shift keying (PSK), respectively, an amplitude control signal generation circuit that generates an amplitude control signal having an amplitude corresponding to a change in a signal level of the data signal, a polarity reversal circuit that generates a polarity reversal signal by reversing a polarity of a carrier wave signal according to the signal level of the data signal upon receiving a ASK designation signal, an amplifier circuit that generates a PSK signal by amplifying the polarity reversal signal at an amplification rate based on the amplitude control signal upon receiving a PSK designation signal, and generates an ASK signal by modulating an amplitude of the carrier wave signal at an amplification rate based on the amplitude control signal upon receiving the ASK designation signal.