Template-circuit
From Circuitopedia
| Family: | -family name, e.g., opamp, comparator- |
|---|---|
| Technology: | -MOS/BJT/others- |
| Inventor: | -inventor name- |
| Year: | -year of invention- |
Contents |
Schematic
- Put an image of the schematic here. It will be useful to mark all nodes and number all components. -
Description
-put description here-
Equation Notes:
1. This expression for gain is derived from small signal analysis of the circuit. It is accurate except that it ignores body effect.
Hierarchical Decomposition
- Put a hierarchical decomposition of circuit here. See two-stage opamp example below. Read this for tips -
++Two stage Opamp
+++ First stage: Differential Amplifier
+++++ Simple PMOS common-source stage (Choices: PMOS Cascode stage, )
+++++ Simple NMOS current mirror (Choices: NMOS Cascode, Improved Swing Cascode, High Swing Cascode current mirror)
+++ Second stage
+++++ Simple NMOS common source (Choices:Link)
+++++ PMOS based active load (Choices:Link)
SPECIFICATIONS
Specifications inherited from family: family-name
- put general specifications associated with the family and inherited by the current circuit. Enlist one specification in each line -
Specifications particular
- put any specifications which are particular to this block which has to be measured due to the particular behaviour of the circuit. Enlist one specification in each line-
Behavioral Model
- Insert behavioral model here -
EQUATIONS
NOTE: Equations contain an accuracy meter out of 5 represented by +-, there can be multiple equations for same specification, trading accuracy for understandability.
- Enter equations for all specifications you know in simple latex format. Heuristically assign a accuracy meter next to the equation. You can enter multiple equations for the same specification and give them an accuracy number. If you want to write a note about the equation, assign a number to the note. Put the note number next to the equation and include the note in description. Example given with gain -
-Enter equations under sub-headings.-
DC Equations and constraints
Above threshold constraints
-Enter here-
Saturation constraints
-Enter here-
Gate-to-source voltages
-Enter here-
Equations for small signal specifications
-Enter here-
-e.g., 
(++++-) Note 1 -
Equations for large signal specifications
-Enter here-
Intuition: How to size the circuit?
-insert methodology to size, iterations, hacks, things to take care of while sizing, problems faced here. Edit a prior version or just add a horizontal line and write your version. As many versions, the better-
Documents
- Any project report/review(non-confidential) on this circuit -
Design for robustness
Layout concerns
SPICE NETLIST
-Enter SPICE netlist here. Please mention the commercial package the spice netlist is compatible with, for instance, HSPICE, ELDO, PSPICE, etc. Enclose netlist in...markup. You can enter more than one spice netlist (one each for each commercial offering separating them by a horizontal line-
SPICE routines to measure specifications
-Enter SPICE routines to measure specifications-
HSPICE
Gain
.MEAS AC FU WHEN VM(6)=1
Phase Margin
.MEAS AC PM FIND VP(6) WHEN VM(6)=1
