MosChip Technologies Interview Questions and Answers

Factory override in UVM allows users to replace default factory methods with custom implementations.

• Factory override is used to customize the behavior of UVM components without modifying the original source code.

• It allows users to replace default factory methods with custom implementations to meet specific requirements.

• Factory override can be useful for debugging, testing, or adding new features to existing UVM components.

• Example: Overriding the default create method in a UVM...read more

m_sequencer and p_sequencer are components used in design and verification for sequencing operations.

• m_sequencer and p_sequencer are commonly used in digital design for controlling the sequence of operations.

• m_sequencer typically refers to a master sequencer, while p_sequencer refers to a peripheral sequencer.

• These components are often used in verification environments to ensure proper sequencing of events.

• For example, m_sequencer may control the overall flow of a testbench, ...read more

A call back in UVM is a mechanism used to notify a component about a specific event or condition.

• A call back is defined using a function or task in the UVM component.

• It is registered with the UVM framework to be executed when a certain event occurs.

• Call backs are commonly used for handling events like transaction completion or error detection.

Antenna violations can be fixed by adjusting the metal layers, adding shielding, or changing the routing.

• Adjust metal layers to increase spacing between antennas

• Add shielding to isolate antennas from each other

• Change routing to avoid crossing antennas

A MOS capacitor is a metal-oxide-semiconductor structure used in integrated circuits for storing charge.

• Consists of a metal gate separated from a semiconductor substrate by a thin insulating layer

• Used in various applications such as DRAM cells and analog circuits

• Capable of storing charge and modulating the capacitance based on the voltage applied

A mirror circuit is a circuit configuration where two transistors are connected in a way that their characteristics are mirrored.

• Consists of two transistors with their bases connected together

• Used to replicate a current or voltage with high accuracy

• Commonly used in current mirrors and voltage mirrors

I use various types of testing such as functional testing, performance testing, interoperability testing, and security testing.

• Functional testing: Ensuring that the Bluetooth/WLAN features work as expected.

• Performance testing: Evaluating the speed and responsiveness of the Bluetooth/WLAN connections.

• Interoperability testing: Checking compatibility with different devices and networks.

• Security testing: Assessing the security measures in place to protect Bluetooth/WLAN connectio...read more

PD flow is the process of designing and implementing the physical layout of an integrated circuit.

• PD flow involves floorplanning, placement, routing, and physical verification.

• Floorplanning determines the placement of blocks and macros on the chip.

• Placement involves placing standard cells in the available space based on timing and area constraints.

• Routing connects the placed cells using metal layers to create the final interconnections.

• Physical verification checks for design ...read more