US6477148B1
Expired / Lapsed
US
⏱️ 0.0 years remaining
Radio transceiver on a chip
Assignee: Telefonaktiebolaget LM Ericsson AB
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Filing: 2000-05-05
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Granted: 2002-11-05
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Expires: 2020-05-05
Abstract
Abstract An entire radio transceiver can be completely integrated into one IC chip. In order to integrate the IF filters on the chip, a heterodyne architecture with a low IF is used. A single, directly modulated VCO is used for both up-conversion during transmission, and down-conversion during reception. Bond-wires are used as resonators in the oscillator tank for the VCO. A TDD scheme is used in the air interface to eliminate cross-talk or leakage. A Gaussian-shaped binary FSK modulation scheme is used to provide a number of other implementation advantages.
Inventors
- 👤 Karl Håkan Torbjörn Gardenfors
- 👤 Sven Mattisson
- 👤 Jacobus Cornelis Haartsen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 21:41
CPC Classifications
H; H04; H04B; H04B1/00; H04B1/38; H04B1/40; H04B1/44; H04B1/3827; H04B1/3833; H04B1/403; H04B1/408; H04B1/69; H04B1/713; H04B1/715; H04B15/00; H04J; H04J3/00; H04J3/02; H04J3/10; H04L; H04L27/00; H04L27/10; H04L27/12; H04L27/122; H04L5/00; H04L5/14; H04L5/1461; H04B2001/7152
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
181 words
A radio on a single integrated circuit chip, comprising: an antenna section for transmitting at least one high frequency transmit signal and receiving at least one high frequency receive signal, the transmission of said at least one high frequency transmit signal segregated from the reception of said at least one high frequency receive signal using time division duplexing; a single heterodyne down-conversion section coupled to said antenna section, for down-converting each high frequency receive signal directly to a low intermediate frequency signal; a bandpass filter coupled to the down-conversion section for channel filtering the low intermediate frequency signal; a discriminator coupled to the bandpass filter for detecting a received data signal from the low intermediate frequency signal; a shaping filter for shaping a data signal to be transmitted; and a variable controlled oscillator coupled to the antenna section and to the shaping filter for generating the at least one high frequency transmit signal in response to the shaped data signal, wherein the variable controlled oscillator is further coupled to the down-conversion section for use in down-converting each high frequency receive signal.
Claim 2
Dependent Claim
181 words
A radio on a single integrated circuit chip, comprising: an antenna section for transmitting at least one high frequency transmit signal and receiving at least one high frequency receive signal, the transmission of said at least one high frequency transmit signal segregated from the reception of said at least one high frequency receive signal using time division duplexing; a single heterodyne down-conversion section coupled to said antenna section, for down-converting each high frequency receive signal directly to a low intermediate frequency signal; a bandpass filter coupled to the down-conversion section for channel filtering the low intermediate frequency signal; a discriminator coupled to the bandpass filter for detecting a received data signal from the low intermediate frequency signal; a shaping filter for shaping a data signal to be transmitted; and a variable controlled oscillator coupled to the antenna section and to the shaping filter for generating the at least one high frequency transmit signal in response to the shaped data signal, wherein the variable controlled oscillator is further coupled to the down-conversion section for use in down-converting each high frequency receive signal.
Claim 3
Dependent Claim
14 words
The radio of claim 1 wherein the down-conversion section comprises an image rejection device.
Claim 4
Dependent Claim
56 words
The radio of claim 2 wherein the image rejection device includes a first mixer for mixing the at least one high frequency receive signal with a local oscillator signal from the variable controlled oscillator and a second mixer for mixing the at least one high frequency receive signal with a ninety degree phase-shifted local oscillator signal.
Claim 5
Dependent Claim
35 words
The radio of claim 3 wherein the image rejection device further includes at least one phase shifter for phase-aligning the outputs of the first and second mixers and an adder for combining said phase-aligned outputs.
Claim 6
Dependent Claim
78 words
The radio of claim 1 wherein the transmission of the at least one high frequency transmit signal and the reception of the at least one high frequency receive signal is performed in accordance with a frequency-division duplex scheme, such that the at least one high frequency transmit signal is transmitted at a first frequency and the at least one high frequency receive signal is received at a second frequency, wherein said first frequency differs from said second frequency.
Claim 7
Dependent Claim
30 words
The radio of claim 1 , wherein the at least one high frequency receive signal and the at least one high frequency transmit signal are modulated using frequency shift keying.
Claim 8
Dependent Claim
15 words
The radio of claim 6 , wherein the shaping filter comprises a Gaussian shaping filter.
Claim 9
Dependent Claim
14 words
The radio of claim 6 wherein the discriminator comprises a frequency modulation discriminator stage.
Claim 10
Dependent Claim
22 words
The radio of claim 1 further comprising a power amplifier through which the variable controlled oscillator is coupled to the antenna section.
Claim 11
Dependent Claim
18 words
The radio of claim 1 , wherein the low intermediate frequency signal is centered at about 3 MHz.
Claim 12
Dependent Claim
15 words
The radio of claim 1 , wherein the bandpass filter comprises a CMOS gyrator filter.
Claim 13
Dependent Claim
16 words
The radio of claim 1 , wherein the variable controlled oscillator uses bond-wire inductors as resonators.
Claim 14
Dependent Claim
39 words
The radio of claim 1 , wherein the transmission of the at least one high frequency transmit signal and the reception of the at least one high frequency receive signal is performed in accordance with a frequency hopping scheme.
Claim 15
Dependent Claim
44 words
The radio of claim 13 , wherein the transmission of each high frequency transmit signal and the reception of each high frequency receive signal comprise a duplex frame, each duplex frame sent at a new hop frequency in accordance with the frequency hopping scheme.
Claim 16
Dependent Claim
17 words
The radio of claim 1 , wherein data transfer is performed using automatic retransmission request error correction.
Claim 17
Dependent Claim
17 words
The radio of claim 1 , wherein speech coding is performed using continuous variable slope delta modulation.
Claim 18
Dependent Claim
43 words
The radio of claim 1 , wherein all active components are integrated on a single integrated circuit chip, and at least one of a passive loop filter and a passive variable controlled oscillator resonator is located external to the single integrated circuit chip.
Claim 19
Dependent Claim
21 words
The radio of claim 1 , further comprising a reference filter for autotuning at least the bandpass filter to the discriminator.
Claim 20
Dependent Claim
16 words
The radio of claim 1 , wherein the variable controlled oscillator includes a phase locked loop.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2005-11-04 | 2006-05-06 | 2006-11-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2009-11-04 | 2010-05-06 | 2010-11-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2013-11-04 | 2014-05-06 | 2014-11-05 | $7700.00 | Window Closed / Lapsed |