Transceiver with frequency multiplier tracked to frequency generator

• US 20020119759A1
• Filed: 02/23/2001
• Published: 08/29/2002
• Est. Priority Date: 02/23/2001
• Status: Active Grant

• Current Assignee: Telefonaktiebolaget LM Ericsson
• Original Assignee: Koninklijke Philips Electronics N.V. (Koninklijke Philips N.V.)
• Inventors: Hahn, Wilhelm Steffen
• Granted Patent: US 6,985,702 B2
• Time in Patent Office: Days
• US Class Current: 455/77
• CPC Class Codes: H03B 19/14 by means of a semiconductor device
• CPC Class Codes: H04B 1/40 Circuits

Abstract

A transceiver has frequency generating means for generating a first signal at a first frequency. The frequency generating means has first tank means for resonating at the first frequency. The transceiver further has frequency multiplication means for multiplying the first signal by an integral multiple of a fundamental frequency of the first signal. The frequency multiplication means has second tank means for resonating at a harmonic frequency of the fundamental frequency, the harmonic frequency being determined by the integral multiple. The frequency multiplication means has output means for outputting a second signal at the harmonic frequency. The first tank means is highly frequency selective around the first frequency, and the second tank means is highly frequency selective around the harmonic frequency. The transceiver has tuning means for simultaneously tuning the first and second tank means, and has up/down-conversion means for up/down-converting the second signal.

Claims

1. A transmitter comprising:

frequency generating means for generating a first signal at a first frequency, said frequency generating means including first tank means for resonating at said first frequency;

frequency multiplication means for multiplying said first signal by an integral multiple of a fundamental frequency of said first signal, said frequency multiplication means including second tank means for resonating at an harmonic frequency of said fundamental frequency, said harmonic frequency being determined by said integral multiple, and said frequency multiplication means including output means for outputting a second signal at said harmonic frequency, said first tank means being highly frequency selective around said first frequency, and said second tank means being highly frequency selective around said harmonic frequency;

tuning means for simultaneously tuning said first and second tank means; and

up-converting means using said second signal for up-conversion of a transmit signal.

2. A transmitter as claimed in Claim 1, wherein said tuning means is configured to tune said second tank means over a given frequency band, in frequency increments of physical channels of said frequency band.

3. A transmitter as claimed in claim 2, wherein said physical channels have narrow channel band widths as compared to said given frequency band.

4. A transmitter as claimed in claim 1, wherein said first tank means comprises first frequency determining elements and said second tank means comprises second frequency determining elements, said first and second frequency determining elements being first on-chip matching elements.

5. A transmitter as claimed in claim 4, wherein said first on-chip matching elements comprise unitary capacitive elements and unitary inductive elements.

6. A transmitter as claimed in claim 1 wherein said frequency generating means comprises first active elements and said frequency multiplying means comprises second active elements, said first and second active elements being second on-chip matching elements.

7. A transmitter as claimed in claim 6, wherein said first and second active elements comprise bipolar transistors with matching emitter areas.

8. A transmitter as claimed in claim 6, wherein said first and second active elements comprise field effect transistors comprised of unitary channel dimensions.

9. A transmitter as claimed in claim 5, wherein said first tank means comprises a first number of said unitary capacitive elements and a second number of said unitary inductive elements, and said second tank means comprises a third number of said unitary capacitive elements and a forth number of said unitary capacitive elements, said first number being a first multiple of said third number, and said second number being a second multiple of said forth number.

10. A transmitter as claimed in claim 9, wherein said first multiple is equal to said second multiple.

11. A transmitter as claimed in claim 1, wherein said first tank means comprises a first varactor, and said second tank means comprises a second varactor, said first and second varactors being comprised in said tuning means.

13. A transceiver as claimed in claim 12, wherein said tuning means is configured to tune said second tank means over a given frequency band, in frequency increments of physical channels of said frequency band.

14. A transceiver as claimed in claim 13, wherein said physical channels have narrow channel band widths as compared to said given frequency band.

15. A transceiver as claimed in claim 12, wherein said first tank means comprises first frequency determining elements and said second tank means comprises second frequency determining elements, said first and second frequency determining elements being first on-chip matching elements.

16. A transceiver as claimed in claim 15, wherein said first on-chip matching elements comprise unitary capacitive elements and unitary inductive elements.

17. A transceiver as claimed in claim 12, comprising a transmitter with up-converting means using said second signal for up-conversion of a transmit signal.

18. A transceiver as claimed in claim 17, further comprising a receiver with down-converting means, said down-conversion means using said second signal for down-conversion of a received signal.

19. A transceiver as claimed in claim 12, comprising a receiver with down-converting means using said second signal for down-conversion of a received signal.

12. A transceiver comprising:

frequency generating means for generating a first signal at a first frequency, said frequency generating means including first tank means for resonating at said first frequency;

frequency multiplication means for multiplying said first signal by an integral multiple of a fundamental frequency of said first signal, said frequency multiplication means including second tank means for resonating at an harmonic frequency of said fundamental frequency, said harmonic frequency being determined by said integral multiple, and said frequency multiplication means including output means for outputting a second signal at said harmonic frequency, said first tank means being highly frequency selective around said first frequency, and said second tank means being highly frequency selective around said harmonic frequency;

tuning means for simultaneously tuning said first and second tank means.

20. A receiver comprising:

frequency generating means for generating a first signal at a first frequency, said frequency generating means including first tank means for resonating at said first frequency;

frequency multiplication means for multiplying said first signal by an integral multiple of a fundamental frequency of said first signal, said frequency multiplication means including second tank means for resonating at an harmonic frequency of said fundamental frequency, said harmonic frequency being determined by said integral multiple, and said frequency multiplication means including output means for outputting a second signal at said harmonic frequency, said first tank means being highly frequency selective around said first frequency, and said second tank means being highly frequency selective around said harmonic frequency;

tuning means for simultaneously tuning said first and second tank means; and

down-conversion means using said second signal for down-conversion of a received signal.