Welcome to EDAboard.com

Welcome to our site! EDAboard.com is an international Electronic 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.

Register Log in

Differential vs. SIngle ended Charge Pump

Status
Not open for further replies.

Engineer4ever

Member level 3
Joined
Feb 2, 2013
Messages
67
Helped
1
Reputation
2
Reaction score
1
Trophy points
1,288
Activity points
1,747
HI, :)

I am designing a differential charge pump, but I was thinking if it's right to use two single ended charge pumps instead of a differential charge pump, beacuse I don't want to use a CMFB circuit, so I am thinking to use two single ended charge pumps; one with input UP and DOWN and the second with input UP-BAR and DOWN-BAR, and each charge pump output will be connected to a loop filter and the outputs of the loop filters will be the differential input of the ring VCO. Is that correct?
 

BradtheRad

Super Moderator
Staff member
Joined
Apr 1, 2011
Messages
13,738
Helped
2,719
Reputation
5,434
Reaction score
2,636
Trophy points
1,393
Location
Minneapolis, Minnesota, USA
Activity points
102,538
'Charge pump' suggests you are making a voltage multiplier built from diode-capacitor (Villard) cells.

'Single-ended' suggests you are driving it from pulsed DC.

It is possible to do this, although you will need more stages to obtain a given output, whereas an AC supply would require fewer stages.

It is even possible to create a negative charge pump from DC pulses.
 

Engineer4ever

Member level 3
Joined
Feb 2, 2013
Messages
67
Helped
1
Reputation
2
Reaction score
1
Trophy points
1,288
Activity points
1,747
'Charge pump' suggests you are making a voltage multiplier built from diode-capacitor (Villard) cells.

'Single-ended' suggests you are driving it from pulsed DC.

It is possible to do this, although you will need more stages to obtain a given output, whereas an AC supply would require fewer stages.

It is even possible to create a negative charge pump from DC pulses.
Alright, got it. Thanks for your answer :)
 

Status
Not open for further replies.
Toggle Sidebar

Part and Inventory Search

Welcome to EDABoard.com

Sponsor

Top