Shared Receiver Circuit for Terrestrial Satellite Signal Integration
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Solution Overview
Problem
Existing receiver apparatuses face challenges in downsizing the layout area when receiving broadcasted signals with different frequency bands, such as terrestrial and satellite television broadcasting, due to the need for distinct components and circuits for each frequency band.
Innovation Solution
A receiver apparatus is designed with shared components in the signal paths for extracting intermediate-frequency signals from both terrestrial and satellite signals, utilizing a mixer and filter that can function as harmonic rejection and bandpass/lowpass filters respectively, to accommodate both frequency bands within a single integrated circuit.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If separate receiver circuits are used for terrestrial and satellite television broadcasting, then the receiving performance for each frequency band is optimized, but the layout area of the IC increases
Solution Approach 1:
The patent implements a universal receiver architecture where a single receiver circuit can handle both terrestrial and satellite television broadcasting by dynamically adjusting its parameters. The receiver includes a tunable front-end, configurable mixer, and adjustable IF processing stage that can be reconfigured via control signals to optimize performance for different frequency bands, thereby eliminating the need for separate dedicated circuits for each broadcasting type.
Solution Approach 2:
The patent employs dynamic parameter adjustment within the receiver circuit to adapt to different receiving modes. Control circuits modify the operating parameters of amplifiers, mixers, and filters in real-time based on whether terrestrial or satellite broadcasting is being received, allowing the same hardware to optimize its performance characteristics for each frequency band dynamically rather than being fixed for a single mode.
2Area of stationary object
If a single receiver circuit is used for both terrestrial and satellite television broadcasting, then the layout area is reduced, but the receiving performance for different frequency bands may be compromised
Solution Approach 1:
The patent divides the receiver circuit into functionally independent but reconfigurable modules: a front-end selection stage, a mixer stage with selectable local oscillators, an IF processing stage with configurable filters, and a demodulation stage. Each module can be independently configured or switched to optimize performance for terrestrial or satellite broadcasting, allowing the system to maintain high receiving performance while using a shared circuit architecture.
Solution Approach 2:
The patent utilizes parameter changes in the receiver components to adapt to different frequency bands. The front-end amplifier gain, mixer local oscillator frequency, IF filter center frequency and bandwidth, and other parameters are dynamically adjusted based on the receiving mode, enabling the single receiver circuit to achieve optimal performance for both terrestrial and satellite broadcasting by changing its operational parameters rather than requiring separate hardware.
3Adaptability or versatility
If the local oscillator circuit oscillation range is extended to cover both frequency bands, then component sharing becomes possible, but the circuit complexity and design difficulty increase
Solution Approach 1:
The patent merges the local oscillator functions for terrestrial and satellite broadcasting into a single integrated oscillator circuit or phase-locked loop system that can generate the required frequency ranges for both applications. This combined oscillator design, along with shared frequency synthesis circuits, reduces the total number of oscillator components while providing the necessary frequency coverage through digital control and programmable frequency generation.
Data Source
AI summary
Provided is a receiver apparatus, including: a first receiver configured to receive a first signal having a first frequency band; and a second receiver configured to receive a second signal having a second frequency band, the second frequency band being different from the first frequency band, in which a signal path for the first signal and a signal path for the second signal share at least one component in a signal path for extracting an intermediate-frequency signal from a received signal, the component being configured to extract a signal of a particular channel from the received signal as the intermediate-frequency signal.