US 7,538,612 B2
	Control circuit for diode based RF circuits
Chandra Bera Subhash, Gujarat (India); Subramanian Bharadwaj Praveen, Gujarat (India); and Singh Rajvir, Gujarat (India)
Assigned to Indian Space Research Organisation, Karnataka (India)
Appl. No. 10/567,342 PCT Filed Aug. 04, 2003, PCT No. PCT/IN03/00265 § 371(c)(1), (2), (4) Date Oct. 06, 2006, PCT Pub. No. WO2005/013029, PCT Pub. Date Feb. 10, 2005.
Prior Publication US 2007/0273354 A1, Nov. 29, 2007
Int. Cl. H03G 3/10 (2006.01)

U.S. Cl. 330—254  [330/282; 327/306; 327/310]

10 Claims

1. A control circuit for diode based RF circuit comprising two or more analog commutating devices connected in tandem having a plurality of digital control lines, a plurality of selectable poles and at one common pole, the digital control lines being connected to a digital data generator and the selectable poles and at least one common pole being connected to the control terminal(s) of the diode(s) of the RF circuit through a network of resistors of differing values and a potential divider and a power supply or voltage source or a network of potential dividers of differing outputs and a power supply or voltage source, the analog commutating device establishing an internal coupling between the common pole and one of the selectable poles depending upon the digital value generated by the digital data generator and appearing at the digital control lines.