Continue to Site

Welcome to EDAboard.com

Welcome to our site! EDAboard.com is an international Electronics Discussion Forum focused on EDA software, circuits, schematics, books, theory, papers, asic, pld, 8051, DSP, Network, RF, Analog Design, PCB, Service Manuals... and a whole lot more! To participate you need to register. Registration is free. Click here to register now.

how to layout a latch comparator?

Status
Not open for further replies.

tuza2000

Full Member level 2
Full Member level 2
Joined
Nov 12, 2004
Messages
141
Helped
6
Reputation
12
Reaction score
3
Trophy points
1,298
Activity points
1,079
is there any material about layout latch compartor?
i am doing some work on latch comparator,but i dont to know how to do it ?
 

the art of analog layout
 

    tuza2000

    Points: 2
    Helpful Answer Positive Rating
tuza2000,

There are many different kinds of latched comparators. Which one are you designing?

A very simple one is to cascade two inverters INV1 and INV2. Connect the output of INV1 to its input. This makes INV1 a simple comparator. INV2 is the latch to the output of INV1. This is an asynchronous type.

To make it synchronous, add two pass transistors, one at the input of INV1, the other at the output INV2. Using a clock signal to synchronise the pass transistors via the gates.

To improve, you can replace pass transistors with transmission gates, but you need non-overlapped clock signals, Ph1 and Ph2 (NOT of Ph1). Such that Ph1 to NMOS, Ph2 to PMOS.
 

    tuza2000

    Points: 2
    Helpful Answer Positive Rating
my design is the preamp add tow cascade inberters,how can i consider the symmtery and latch up?
 

    tuza2000

    Points: 2
    Helpful Answer Positive Rating
Status
Not open for further replies.

Part and Inventory Search

Welcome to EDABoard.com

Sponsor

Back
Top