Patent Document ID: 4370642
Application ID: 06209454
Patent Flag: 1

Claim One:
1. An improved ladder network for simultaneous implementation of nonlinear sine and cosine functions having the general form K.sub.1 N/(1+K.sub.1 N) in a converter comprising: (a) a plurality of binarily weighted resistors; (b) a first analog signal line connected in common to one end of all said resistors; (c) a plurality of single pole double throw analog switches equal in number to the number of resistors in said plurality, each having a common terminal, a normally open terminal, a normally closed terminal and a control input, the common terminals connected to respective ones of said plurality of resistors; (d) means for coupling the bits of a digital word representative of an angle to the respective control inputs of said switches; (e) an analog sine signal line connected through a first resistor to the normally open terminals of all of said switches; and (f) an analog cosine signal line connected through a second resistor to the normally closed terminals of all of said switches.