# US 2013/0154751 A1 · Voltage controlled oscillator

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- Number: US 2013/0154751 A1
- Document ID: US20130154751A1
- Status: Published application
- Kind: A1
- Application number: 13/713,599
- Filed: 2012-12-13
- Published: 2013-06-20
- Earliest claimed: 2011-12-16
- Assignees: Soongsil University-Industry Cooperation Foundation; Electronics and Telecommunications Research Institute
- Inventors: Dong-Uk SIM; Young Jun CHONG; Yong MOON; Hyeon Seok JANG
- Web page: https://patentgrep.com/patent/US20130154751A1

## CPC

- H03B 7/00: Generation of oscillations using active element having a negative resistance between two of its electrodes (H03B9/00 takes precedence)
- H03B 1/00: Details
- H03B 5/18: with frequency-determining element comprising distributed inductance and capacitance
- H03B 2200/0016: including a ring, disk or loop shaped resonator
- H03B 2200/0048: including measures to switch the frequency band, e.g. by harmonic selection
- H03B: GENERATION OF OSCILLATIONS, DIRECTLY OR BY FREQUENCY-CHANGING, BY CIRCUITS EMPLOYING ACTIVE ELEMENTS WHICH OPERATE IN A NON-SWITCHING MANNER; GENERATION OF NOISE BY SUCH CIRCUITS (generators adapted for electrophonic musical instruments G10H; masers or lasers H01S; generation of oscillations in plasma H05H)

## Abstract

A voltage controlled oscillator includes a split ring resonator (SRR) configured to have meta-material characteristics fabricated on a board, and an energy compensation circuit configured to cause resonant oscillation of the SRR. The energy compensation circuit is fabricated in the form of an integrated circuit.

## Claims

### Claim 1

A voltage controlled oscillator, comprising:
a split ring resonator (SRR) configured to have meta-material characteristics fabricated on a board; and
an energy compensation circuit configured to cause resonant oscillation of the SRR, the energy compensation circuit being fabricated in the form of an integrated circuit.

### Claim 2 (depends on 1)

The voltage controlled oscillator of claim 1, wherein the SRR has a negative refractive index and a negative permeability.

### Claim 3 (depends on 1)

The voltage controlled oscillator of claim 1, wherein the energy compensation circuit further comprises a negative resistance circuit.

### Claim 4 (depends on 1)

The voltage controlled oscillator of claim 1, wherein the energy compensation circuit is implemented as a cross-coupled metal oxide semiconductor field-effect transistor (MOSFET).

### Claim 5 (depends on 3)

The voltage controlled oscillator of claim 3, wherein the energy compensation circuit is implemented as a cross-coupled metal oxide semiconductor field-effect transistor (MOSFET).

### Claim 6

A voltage controlled oscillator, comprising:
multiple split ring resonators (SRRs) configured to have meta-material characteristics fabricated on a board, the SRRs operating at different frequencies;
an energy compensation circuit configured to cause resonant oscillation of the SRR, the energy compensation circuit being fabricated in the form of an integrated circuit; and
multiple switches configured to perform a switching operation to allow any one of the SRRs to make resonant oscillation by the energy compensation integrated circuit.

### Claim 7 (depends on 6)

The voltage controlled oscillator of claim 6, wherein the SRRs comprise a first SRR and a second SRR configured to operate at different frequencies, and
the multiple switches comprise a first switch configured to perform a switching operation between the energy compensation integrated circuit and the first SRR, and a second switch configured to perform a switching operation between the energy compensation integrated circuit and the second SRR.

### Claim 8 (depends on 7)

The voltage controlled oscillator of claim 7, wherein the first switch and the second switch are connected through an inverter.