Telescopic Amplifier

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pungkoko

Joined: 26 Nov 2005
Posts: 1

26 Nov 2005 4:36 telescopic amplifier

Please give me any suggestion to design one stage Telescopic Amplifier with following sepecifications:
DC Open loop gain > 100 dB
Unity gain bandwidth >10 MHz
Phase margin > 70 degree at unity gain
Vout swing > 1V p-p
Minumum Von = 150 mV

Any architecture for this specifications would be appriciated.

Thanks in advance,
Su

sunking

Joined: 25 May 2004
Posts: 914
Helped: 46

28 Nov 2005 2:43 telescopic cascode amplifier

Telescopic Amplifier with gain boost

beckchm

Joined: 13 Nov 2005
Posts: 210
Helped: 3

25 Dec 2005 15:23 telescopic cascode

you can go to refer some books

sdmodulator

Joined: 23 Sep 2005
Posts: 15
Helped: 2

25 Feb 2006 6:02 telescopic amp

three devices cascode

ee171

Joined: 19 Apr 2002
Posts: 67
Helped: 1

25 Feb 2006 8:45 telescopic amplifier design

this looks a typical homework problem at my school.... people need to read book! Smile

fxxjssc

Joined: 06 Jan 2006
Posts: 80
Helped: 2

25 Feb 2006 15:59 telescopic amp

easy one, take a look at some paper

avlsi

Joined: 27 Jan 2006
Posts: 57
Helped: 2

26 Feb 2006 10:37 telescopic amplifier design

U can find its information in Paul Gray and also in Ken Martin. As your Swing is 1V.U can happily use telescopic cascode. Take 5 transistors,it will be helpful for your gain also.

avinash

Joined: 24 Jul 2004
Posts: 170
Helped: 10

03 Mar 2006 5:38 telescopic amplifier design thesis

only your gain criteria is critical one.rest of the specs can be achieved quite easily.so you have to choose the arcitecture which will provide additional gain.with this regard,you might use gain boosted telescopic amplifier.you can get little theory on this in razavi's book.moreover search on google,you will get enough materials/thesis on gain boosted telescopic amplifier.if you fing difficult to design telescopic amplifier(its difficult to set the dc operating conditions of telescaopic amplifier),you can switch to gain boosted tfolded cascode amplifier.it is easier to design than telescopic one.

vlsiattitude

Joined: 05 Mar 2005
Posts: 32

04 Mar 2006 17:53 thesis gain boosting

refer razavi it has good example on telescopic opamp

assembly

Joined: 24 Oct 2004
Posts: 5

05 Mar 2006 6:00 telescopic cascode

Refer to CMOS circuit desgin by Allen and Hollberg Chapter 6. It has detailed design steps for a amplifier design.

nagula suresh

Joined: 23 Jan 2005
Posts: 30
Helped: 1

08 Mar 2006 12:04 thesis on telescopic amplifier

that high gain can be acheived by using the single gain boosting stage.,
it can be telescopic or folded cascode.,
telescopiec will give less noise,and swing is also no consraint ,so u can easily achieve it through telescopic stage.

krishmaniac

Joined: 21 Mar 2006
Posts: 10
Helped: 1

21 Mar 2006 3:54 telescopic amplifier working

how to design for systematic offset? the designs in the book of allen are given interms of the input offsets.

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21 Mar 2006 3:54 Ads

avlsi

Joined: 27 Jan 2006
Posts: 57
Helped: 2

21 Mar 2006 16:21 what is telescopic amplifier

it apears that you are using 3V supply,Use Gain bosted telescopic casocde. For reference search in berkeley under EE240 projects. there are circuits based on such specification.

husseinadel

Joined: 25 Jan 2006
Posts: 184
Helped: 12
Location: EGYPT,CAIRO

21 Mar 2006 17:50 telescopic amplifer

cmos analog ic design by razavi,, it contains a whole chapter with design steps about what you ask.......

zenisle

Joined: 11 Sep 2005
Posts: 131
Helped: 2

22 Mar 2006 3:29 a two-stage telescopic amplifier

refer analog circuit design book

Mado_eng

Joined: 16 Nov 2005
Posts: 22

22 Mar 2006 8:26 gain boosted folded casocde

don't forget common mode feedback circuit ( CMFB) razavi discussed this topic very good

ee484

Joined: 04 Jan 2005
Posts: 161
Helped: 2

23 Mar 2006 0:09 gain boosted telescopic amplifier

Since the technology shinks, I would recommend 2 stage amplifier (ex...1-stage OTA: telescopic + SC for 2nd stage).
What other guys think?

Added after 1 minutes:

Gain boostin is good...but read the appropriate paper before you design one.
Unless you don't know what you are doing, you might have a pole-zero doublet, which slows your circuit down significantly.

ahmad_abdulghany

Joined: 12 Apr 2005
Posts: 1369
Helped: 212
Location: Cairo, Egypt

10 Apr 2006 0:17 Re: Telescopic Amplifier

There's an A-Z example that designes a telescopic cascode op-amp, in Razavi's book, Refer to it,

then try to build and simulate,

Tune parameters,

And, try most closer results to required,

Regards,
Ahmad,