| |
| # Diagram [A] - The many diodes potential diodes. |
| # |
| # Vin |
| # /-----------------^-----------------\ |
| # | | |
| # GND <----+-----------+ +--^--+ Vo +--^--+ +------------+---> VDD |
| # | | +#####+ /---------^---------\ +#####+ | | |
| # | | /-------\ | | /-------\ | | |
| # +----+---^---+--+----^----+-----+----^----+---+-----+----^----+-----+----^----+--+----^----+--+-+ |
| # | | | | | | | | | | | | | | | | |
| # | | P+ | | N+ | | N+ | | | P+ | | P+ | | N+ | | | |
| # | | | | | | | | | | | | | | | | |
| # | | | | [1] | | [1] | | | [2] | | [2] | | | | | |
| # | | | | ▁╻▁ | | ▁╻▁ | | | ╻ | | ╻ | | | | | |
| # | +-------+ +---◢■◣---+ +---◢■◣---+ | +---◥■◤---+ +---◥■◤---+ +---------+ | | |
| # | ╹ ╹ | ▔╹▔ ▔╹▔ | | |
| # | | [3] N-Well | | |
| # | P Substrate | ▁╻▁ | | |
| # | +--◢■◣------------------------------------------+ | |
| # | ╹ | |
| # | | |
| # +------------------------------------------------------------------------------------------------ |
| # |
| # Diode [1] - Parasitic diode between psub and ndiff |
| # Diode [2] - Parasitic diode between pdiff and nwell |
| # Diode [3] - Parasitic diode between psub and nwell |
| |
| |
| # Diagram [N] - `ndiode` -- Intentional Diode between pwell and ndiff |
| # |
| # | | # |
| # | | # |
| # --+----+--+----^----+-----+----^----+--+-----+----- # |
| # | | | | | | | | # |
| # | | | P+ | | N+ | | | # |
| # | | | | | | | | # |
| # | | | | | [1] | | | # |
| # | | | | | ▁╻▁ | | | # |
| # | | +---------+ +---◢■◣---+ | | # |
| # | | ╹ | | # |
| # | | [2] P-Well | | # |
| # | | ╻ | | # |
| # | +--◥■◤--------------------------+ | # |
| # | ▔╹▔ | # |
| # | | # |
| # | [3] Deep N-Well | # |
| # | ▁╻▁ | # |
| # +----------------◢■◣-----------------------+ # |
| # ╹ # |
| # P Substrate # |
| # # |
| # --------------------------------------------------- # |
| # |
| # [1] - ndiode - pwell to ndiff -- intentional |
| # [2] - - pwell to deep-nwell -- parastic |
| # [3] - - psub to deep-nwell -- parastic |
| |
| |
| # Diagram [P] - `pdiode` -- Intentional Diode between pdiff and nwell |
| # |
| # | | # |
| # | | # |
| # -------+--+----^----+-----+----^----+--+-----+----- # |
| # | | | | | | # |
| # | | P+ | | N+ | | # |
| # | | | | | | # |
| # | | [1] | | | | # |
| # | | ╻ | | | | # |
| # | +---◥■◤---+ +---------+ | # |
| # | ▔╹▔ | # |
| # | [2] N-Well | # |
| # | ▁╻▁ | # |
| # +--◢■◣--------------------------+ # |
| # ╹ # |
| # P Substrate # |
| # # |
| # --------------------------------------------------- # |
| # |
| # [1] - pdiode - pdiff to nwell -- intentional |
| # [2] - - psub to nwell -- parastic |
| |
| |
| |
| |
| # | | | | |
| # | | | | |
| # +-+--+----^----+---+----^----+--+---+--+----^----+-----+----^----+--+-+ |
| # | | | | | | | | | | | | | | |
| # | | | P+ | | N+ | | | | P+ | | N+ | | | |
| # | | | | | | | | | | | | | | |
| # | | | [1] | | | | | | | | [2] | | | |
| # | | | ╻ | | | | | | | | ▁╻▁ | | | |
| # | | +---◥■◤---+ +---------+ | | +---------+ +---◢■◣---+ | | |
| # | | ▔╹▔ | | ╹ | | |
| # | | N-Well | | [3] P-Well | | |
| # | | ▁╻▁ | | ╻ | | |
| # | +---◢■◣----------+------------+---+--◥■◤-------------------+------+ | |
| # | ╹ | ▔╹▔ | | |
| # | [5]? | | | |
| # | | [4] Deep N-Well | | |
| # | | ▁╻▁ | | |
| # | +---------------◢■◣-----------------------+ | |
| # | ╹ | |
| # | P Substrate | |
| # | | |
| # +---------------------------------------------------------------------+ |
| |
| |
