Multi-Chip IC Timing for Synchronized RF ADC Sampling

The patent introduces a synchronization signal as an intermediary that mediates timing coordination between multiple IC chips. The master chip generates this signal and distributes it to slave chips, which use it to align their ADC sampling operations. This mediator approach resolves the synchronization complexity by providing a centralized timing reference that all chips follow, eliminating the need for complex peer-to-peer coordination protocols.

Instead of having each chip generate its own timing signals and attempt to synchronize with others (bottom-up approach), the patent inverts the approach by having one master chip generate the timing signal and distribute it to all slave chips (top-down approach). This inversion simplifies the synchronization architecture by centralizing timing control, directly addressing the synchronization difficulty that arises when multiple chips operate independently.

The patent applies preliminary action by generating and distributing the synchronization signal before the actual ADC sampling operations begin. The master chip produces the synchronization signal in advance, and slave chips receive and prepare to use it for their sampling operations. This advance preparation ensures that when high-speed sampling occurs, all chips are already synchronized and ready, preventing timing misalignment that would otherwise occur during rapid sampling cycles.

The synchronization signal operates periodically, providing regular timing references at intervals matched to the radar sampling requirements. This periodic action ensures that high-speed ADC sampling across multiple chips occurs at precisely aligned intervals, maintaining synchronization even at high sampling rates. The periodic nature of the signal allows slave chips to continuously align their sampling windows with the master chip without drift accumulation.

The synchronization signal serves as an intermediary that replaces complex handshaking procedures. Instead of chips exchanging multiple control signals to negotiate timing (handshaking), the master chip's synchronization signal directly imposes timing discipline on all slave chips. This mediator approach maintains reliability by ensuring all chips operate from the same timing reference, while dramatically simplifying operation by eliminating the need for complex inter-chip communication protocols and state machine coordination.

Slave chips perform self-service by autonomously using the received synchronization signal to control their own ADC sampling operations. Each slave chip independently aligns its sampling windows to the synchronization signal edges without requiring active participation in handshaking exchanges with other chips. This self-service approach maintains synchronization reliability through the shared timing reference while simplifying operation by removing the need for complex inter-chip coordination sequences.