Activity for DavidE
| Type | On... | Excerpt | Status | Date |
|---|---|---|---|---|
| Question | — |
IEPE Sensor Internal Circuit Based on reading the All About Circuits article on IEPE sensors there are two general types of circuits integrated into this class of sensors: voltage amplifier and charge amplifier. This question regards a two wire interface in which the power unit supplies a current limited nominal voltage of typi... (more) |
— | 7 months ago |
| Question | — |
High Speed Digital Communication Bus Probing For high-speed digital communication busses, what attributes do you generally advise to add to a PCB to help with validating the communication bus as well as troubleshooting the design? In particular, I'm interested in adding features to a PCB with a parallel bus for SDR SDRAM with a clock of 167MHz... (more) |
— | 11 months ago |
| Question | — |
SDR SDRAM PCB Timing Budget I am working on routing a microprocessor to two identical single data rate (SDR) SDRAM chips that are PC166 compliant, particularly Alliance AS4C16M16SB-6TIN25June2021Rev2.0.pdf). The 16 bit SDRAM chips are combined to form a 32 bit word. The microprocessor is of the NXP i.MX RT1170 family and has ... (more) |
— | 11 months ago |
| Question | — |
PCB Copper Layer Spacing & Voltage Rating One standard used for spacing conductors based on voltage is the IPC-2221. This standard differentiates spacing requirements for inner and outer conductors. Does the IPC minimum separation between conductors on an inner copper layer apply to the minimum dielectric thickness between copper layers? ... (more) |
— | over 2 years ago |
| Question | — |
Design considerations for a differential pair Differential pairs, such as for ethernet or a CAN bus, can be designed to be loosely coupled or tightly coupled. For a loosely coupled differential pair, the odd-mode and even-mode impedances are roughly equivalent to the single-ended impedance (impedance of one conductor relative to the common, wit... (more) |
— | over 2 years ago |
| Question | — |
How could you model a 10M/100M Ethernet PHY architecture? Application notes for microcontrollers or other ICs that have an internal 10M/100M ethernet PHY module differ in their requirements for the external interface components. It seems that the PHY design differs enough between devices such that the external component architecture needs to depend on whic... (more) |
— | about 3 years ago |