how can i design opamp ideal?

This is an ambiguous request lacking information to properly assist you. What simulator are you using? Doesn't it have an ideal opamp model itself?

ideal opamp circuit in gyrator circuit in differential configuration is to be designed in cadence tool. So what parameters should be taken care of and what should be done to make this opamp as an ideal one?

* The output changes its voltage to whatever it needs to be, in order to cause both inputs to be at an equal voltage.

* The output can provide infinite amperes.

* Infinite gain is available.

* Gain-bandwidth product is infinite.

Hmmm, there's more than I wrote down above.
For more parameters see this webpage (1/5 of the way down).

http://en.wikipedia.org/wiki/Operational_amplifier

i want that the cmos differentil opamp should have a higher open loop gain that is required for an ideal opamp.But at higher frequeny, open loop gain decreases. so how to work t higher frequencies such that gain is constt. and high?

The term "ideal opamp" describes something that can't be actually made or designed in actual technology.

It's e.g. required for circuit stability that the loop gain falls below unity at a finite frequency. For this reason, any amplifier to be used in a feedback configuration can't have frequency independent constant gain. The practical design challenge is to make an amplifier with high gain-bandwidth product (GBW) and sufficient phase margin so that it can be operated in a stable feedback loop.

You'll need to mention real amplifier specifications required for your design rather than imagening "ideal" OPs.

Gyrator designs working in a 10 to 20 GHz range can be found in literature (google is your friend), but hardly use a regular OP topology.

this gyrator is to be designed in cadence tool using cmos transistors. so is it possible to realize it practically? what can be the desired circuit?