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

High speed BJT recommendation

Status
Not open for further replies.

hithesh123

Full Member level 6
Joined
Nov 21, 2009
Messages
324
Helped
1
Reputation
2
Reaction score
1
Trophy points
1,298
Location
lax
Activity points
3,548
Can you guys recommend some parts numbers for high speed BJT switch.
Speed is 5MHz, Vcc = 30V, Ic = 100mA
 

hithesh123

Full Member level 6
Joined
Nov 21, 2009
Messages
324
Helped
1
Reputation
2
Reaction score
1
Trophy points
1,298
Location
lax
Activity points
3,548
I wanted to know some part numbers that are popular. So it's easy to get them from any local shop rather than digikey.
 

andre_teprom

Super Moderator
Staff member
Joined
Nov 7, 2006
Messages
9,200
Helped
1,142
Reputation
2,303
Reaction score
1,119
Trophy points
1,403
Location
Brazil
Activity points
53,585
Depends of local market at each country.
Some brands are more common to find in Asia, Europe and US.

+++
 

hithesh123

Full Member level 6
Joined
Nov 21, 2009
Messages
324
Helped
1
Reputation
2
Reaction score
1
Trophy points
1,298
Location
lax
Activity points
3,548
The 2N2222 works almost in the entire FW bandwidth. I suppouse that it is for analog aplication.
Can it swing 0-30V at 1MHz.

I simulated it the falling edge has higher slope than rising edge. I know this is bcoz of the stored base charge. Do you have any circuit/techniques to remove the base charge.
 

keith1200rs

Super Moderator
Staff member
Joined
Oct 9, 2009
Messages
10,877
Helped
2,064
Reputation
4,128
Reaction score
1,597
Trophy points
1,403
Location
Yorkshire, UK
Activity points
57,276
A Schottky diode from base to collector can help to minimise charge storage and speed up turn-off.

Keith
 

alexxx

Advanced Member level 4
Joined
Apr 17, 2011
Messages
1,013
Helped
273
Reputation
552
Reaction score
270
Trophy points
1,383
Location
Greece
Activity points
7,938
hithesh123 said:
Can it swing 0-30V at 1MHz
I don't think that 1MHz is considered high speed. I suppose that almost every general purpose BJT could reach frequencies above 1MHz.
Take a look at BC817. It is a cheap general purpose npn, that covers your specifications.
 
Status
Not open for further replies.

Part and Inventory Search

Welcome to EDABoard.com

Sponsor

Top