Circuit arrangement for generating a reference current and...

Details Circuit arrangement for generating a reference current and... Circuit arrangement for generating a reference current and...

2006-08-29

2006-08-29

Shingleton, Michael B (Department: 2817)

Oscillators

With frequency adjusting means

With voltage sensitive capacitor

C331S185000, C331S186000, C327S538000

Reexamination Certificate

active

07098752

ABSTRACT:
A circuit arrangement for generating a reference current and also an oscillator circuit having the circuit arrangement are disclosed the arrangement includes a capacitance connected to an input of a voltage-controlled current source. Two amplifiers having different drive capabilities, between which a switching can be effected, are provided to drive the capacitance. An LC oscillator can be fed with the reference current in a current-controlled manner and at the same time in a particularly low-noise manner.

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Search report for PCT/DE03/00308 dated Feb. 10, 2003.
“Demonstration of a Switched Resonator Concept in a Dual-Band Monolithic CMOS LC-Tuned VCO”, Seong-Mo Yim and Kenneth K. O, IEEE 2001 Custom Integrated Circuits Conference, pp. 205-208.
“A 2.2 GHz CMOS VCO with Inductive Degeneration Noise Suppression”, Pietro Andreani and Henrik Sjöland, IEEE 2001 Custom Integrated Circuits Conference, 3 pgs.

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