Method for simulating a mixer in circuit simulators and the like
AssigneeAgilent Technologies, Inc.
InventorJianjun Yang
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Abstract
A method for operating a data processing system to simulate a mixer having an RF port, a LO port, and an IF port. In the present invention, the signal leaving the IF port is approximated by b2=ƒ(a1,a3)+S22*a2 where S22 is a constant, a2 is a signal input to the IF port, a1 is a signal input to said RF port and a3 is a signal input to said LO port, and 1 f ( a1 , a3 ) = ∑ i = o M ∑ j = o N C ij * a1 i * a3 j The coefficients Cij are constants that depend on said mixer design. These coefficients can be determined by measuring the b2 when a1 and a3 are single tone signals. In addition, The coefficients can be determined by simulating said mixer on a non-linear circuit simulator when a1 and a3 are single tone signals.
Claims3
A method for operating a data processing system to simulate a mixer having a known design, said mixer having an RF port, a LO port, and an IF port, said method comprising the steps of:
- defining an input signal, a2, to said IF port;
- defining an input signal, a1, to said RF port;
- and
- representing the signal, b2, leaving the IF port by
- b2=ƒ(a1,a3)+S22*a2
- where:
- S22 is a constant, a3 is a signal input to said LO port, and
- 4 f ( a1 , a3 ) = ∑ i = o M ∑ j = o N C ij * a1 i * a3 j
- said coefficients Cij being constants that depend on said mixer design.
Dependencies are inferred from the claim text.