complementary signal in hspice

[siddhiqvlsi]

Hi,

The following input signal is generated using hspice....

VA A 0 pulse(0.18v 0v 0n 1n 1n 50n 100n)

how to generate the complementary signal of it in spice?

Thanks in advance.....

 

[keith1200rs]

Use a VCVS - voltage controlled voltage source. This is an E source. Connect the input terminals to your voltage source and reverse the output connections.

Keith

 

[erikl]

VA A 0 pulse(0.18v 0v 0n 1n 1n 50n 100n)

how to generate the complementary signal of it in spice?

It's a pulse source: Vxxx n+ n- pulse (v1 v2 td tr tf pw per)
For a new pulse source VB between nodes B & 0 with complementary signal just reverse the voltage values v1 & v2 :

VB B 0 pulse (0V 0.18V 0ns 1ns 1ns 50ns 100ns)

 

[siddhiqvlsi]

It's a pulse source: Vxxx n+ n- pulse (v1 v2 td tr tf pw per)
For a new pulse source VB between nodes B & 0 with complementary signal just reverse the voltage values v1 & v2 :

VB B 0 pulse (0V 0.18V 0ns 1ns 1ns 50ns 100ns)

Thanks for your reply.....I have used the same to generate the complementary signal.....Is there any way to generate the signal without using the voltage source VA 0r VB since it ultimately increases the average power....

Thanks in advance.....

- - - Updated - - -

Use a VCVS - voltage controlled voltage source. This is an E source. Connect the input terminals to your voltage source and reverse the output connections.

Keith

Thanks for your reply.... how to use VCVS to generate complementary signal....am new to spice.....Can you explain in detail?....Thanks

 

[keith1200rs]

E1 0 B A 0 1

it is as simple as that. I prefer it to a separate voltage source because if you change your original source the E source changes the complementary one automatically.

http://www.ece.uci.edu/docs/hspice/hspice_2001_2-206.html

Keith

 

[erikl]

...Is there any way to generate the signal without using the voltage source VA 0r VB

There are many ways to generate such signals: any type of oscillator + opAmp for phase reversal. But they all need power, whereas VCVS, pulse source or E-element sources don't consume any power (for themselves) as their internal generation resistance is zero.

... it ultimately increases the average power....

Only that power which is needed by the load; the voltage sources themselves don't consume power.