US 7,403,075 B2Granted

Ultra wide band signal generator

AssigneesSamsung Electronics Co., Ltd., Georgia Tech Research Corporation

InventorsRajarshi Mukhopadhyay, Sebastien Nuttinck, Yun-Seo Park, Sang-Woong Yoon, Sang-Hyun Woo, Hyun-Il Kang, Chang-Ho Lee, Joy Laskar

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Abstract

Disclosed is an ultra wide band signal generator. The ultra wide band signal generator generates a signal of a required frequency using a harmonic signal having a frequency range of a ultra wide band (UWB). The ultra wide band signal generator includes an active inductor for generating harmonic signals having power strengths substantially equal to each other within a non-linear operation range, the tunable active inductor capable of tuning a value thereof, an oscillator for amplifying and outputting the harmonic signals generated from the active inductor by frequency-transiting the harmonic signals into high frequency bands, and a filter for selectively outputting one of the harmonic signals output from the oscillator.

Claims12

Dependent claims

An ultra wide band signal generator, comprising:

a tunable active inductor for generating harmonic signals having power strengths substantially equal to each other within a non-linear operating range, the tunable active inductor being capable of tuning a value thereof, comprising:
a first transistor having a source connected to a voltage source and a gate connected to a first bias voltage;
a second transistor having a drain connected to a drain of the first transistor and a gate connected to a second bias voltage;
a third transistor having a drain connected to a source of the second transistor and a source connected to ground;
a fourth transistor having a drain connected to a gate of the third transistor, a source connected to the ground, and a gate connected to a third bias voltage;
a fifth transistor having a source connected to the drain of the fourth transistor and a drain connected to the voltage source;
and
a tunable feedback resistor interposed between the drain of the first transistor and a gate of the fifth transistor;
an oscillator for amplifying and outputting the harmonic signals generated from the tunable active inductor by frequency-transiting the harmonic signals into high frequency bands;
and
a filter for selectively outputting one of the harmonic signals output from the oscillator.

8 more elements

An ultra wide band signal generator, comprising:

a tunable active inductor for generating harmonic signals having power strengths substantially equal to each other within a non-linear operating range, the tunable active inductor being capable of tuning a value thereof;
a first transistor having a base connected to the tunable active inductor;
a first resistor interposed between a first bias voltage and the base of the first transistor;
a first capacitor interposed between the base and the emitter of the first transistor;
a second capacitor interposed between the first capacitor and ground;
a first current source interposed between the emitter of the first transistor and ground;
a first inductor interposed between a voltage source and a collector of the first transistor;
a third capacitor interposed between a collector of the first transistor and an output port;
and
a first variable capacitor interposed between a collector of the first transistor and ground.

7 more elements

An ultra wide band signal generator, comprising:

a tunable active inductor for generating harmonic signals having power strengths substantially equal to each other within a non-liner operation range, the tunable active inductor being capable of tuning a value thereof;
a first transistor having a base connected to the tunable active inductor and a sixth bias voltage;
a first capacitor interposed between the tunable active inductor and the first transistor;
a first variable capacitor interposed between the base and an emitter of the first transistor;
a second variable capacitor interposed between ground and the first variable capacitor;
a first resistor interposed between the emitter of the first transistor and ground;
a first inductor interposed between a voltage source and a collector of the first transistor;
a second capacitor interposed between a collector of the first transistor and an output port;
and
a third variable capacitor interposed between a collector of the first transistor and ground.

7 more elements

Dependencies are inferred from the claim text.

Facts

Application: 11/345,716Filed 2 Feb 2006 · us provisional application
Priority: KR 10-2005-00372913 May 2005
Published: US 2006/0197617 A17 Sep 2006
Granted: 22 Jul 2008
Term ends: Not estimatedThe source records don’t support an estimate.

Classification6 codes

H03B 5/1231
Active element in amplifier being semiconductor device: the amplifier comprising one or more bipolar transistors
H03B 5/1203
Active element in amplifier being semiconductor device: the amplifier being a single transistor
H03B 5/124
Comprising means for varying the frequency of the generator: the means comprising a voltage dependent capacitance
H03B 5/1256
Comprising means for varying the frequency of the generator: the means comprising a variable inductance