One input with a conjugate output IC search

Thread Starter

captoro

Joined Jun 21, 2009
126
Hello,

Anyone know an IC with one input and two conjugate outputs ?
Basically I have a signal and I would like to get the same signal out AND its conjugate signal.

thanks

Ken
 
Last edited:

crutschow

Joined Mar 14, 2008
27,736
To get the complementary signal of a square-wave you simply run it through an inverter (either a digital inverter gate or a common-emitter transistor stage).
 

MisterBill2

Joined Jan 23, 2018
9,292
OK, it seems from the expression you are asking for the signal and it's compliment, That part will be simple if it is a digital square wave, BUT to do it with a single IC we need to know the voltage and the frequency, at least approximately. Is it hertz, megahertz, or gigahertz? And what voltage range?
 

Thread Starter

captoro

Joined Jun 21, 2009
126
[1sterBill2, post: 1651959, member: 512401"]
OK, it seems from the expression you are asking for the signal and it's compliment, That part will be simple if it is a digital square wave, BUT to do it with a single IC we need to know the voltage and the frequency, at least approximately. Is it hertz, megahertz, or gigahertz? And what voltage range?
[/QUOTE]
1khz at 5volts
 

MisterBill2

Joined Jan 23, 2018
9,292
A CD4049 can deliver at least 2 sets of waves and their inverted wave and it costs less than a dollar and requires zero programming and it consumes FAR less power. Also it is good up to several megahertz without additional adjustment.
 

Thread Starter

captoro

Joined Jun 21, 2009
126
A CD4049 can deliver at least 2 sets of waves and their inverted wave and it costs less than a dollar and requires zero programming and it consumes FAR less power. Also it is good up to several megahertz without additional adjustment.
Isn't the CD4049 an inverter? Yes I can get their invertered but the signal going through the CD4049 will be delayed few clock cycle relative to the input.... Isn't there an IC that can have Q and Qprime as output?
 

Ian0

Joined Aug 7, 2020
3,252
Assuming it's digital:
CD4041
or
74HC86 - quad exclusive or gates. Two gates, one with the spare input tied low and one with the spare input tied high.

Assuming it's analogue:
THS4531
 
Last edited:

Ian0

Joined Aug 7, 2020
3,252
CD4041 is what I need, thank you.
If you look at the datasheet, you'll see that one output has two inverters and the other has a single inverter - in other words, just the same as if you'd used a 4049 or 4069.
If you wanted equal propagation delays, the 74HC86 would have done a better job.
 

Thread Starter

captoro

Joined Jun 21, 2009
126
If you look at the datasheet, you'll see that one output has two inverters and the other has a single inverter - in other words, just the same as if you'd used a 4049 or 4069.
If you wanted equal propagation delays, the 74HC86 would have done a better job.
Right 74HC86 would be better forgot about propagation delays . thank you
 

MisterBill2

Joined Jan 23, 2018
9,292
How fast is the clock that the propagation delay of a CD4049 running on 15 volts is several clock cycles?We were never given a frequency specification, I don't think.
 
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