Receiving module and receiver

• US 6,711,395 B1
• Filed: 10/23/2000
• Issued: 03/23/2004
• Est. Priority Date: 10/21/1999
• Status: Expired due to Fees

• Current Assignee: Murata Manufacturing Co Limited
• Original Assignee: Murata Manufacturing Co Limited
• Inventors: Sasaki, Jun, Tonegawa, Ken, Bando, Tomoya, Shimada, Norihiro, Yoshimoto, Yoshihiro
• Primary Examiner(s): Nguyen, Duc M.
• Application Number:
  US09/694,423
• Time in Patent Office: 1,247 Days
• Field of Search: 455/323, 455/324, 455/325, 455/326, 455/327, 455/328, 455/329, 455/330, 455/333, 455/292, 455/293, 455/313, 455/318, 455/319, 455/334, 455/130, 455/131, 455/180.4, 455/190.1, 327/113, 323/315, 330/252
• US Class Current: 455/313
• CPC Class Codes: H03D 2200/0023 Balun circuits
• CPC Class Codes: H03D 7/1425 with transistors
• CPC Class Codes: H03D 7/1433 using bipolar transistors H03D7/145 takes precedence
• CPC Class Codes: H03D 7/1458 Double balanced arrangements, i.e. where both input signals are differential

Abstract

A receiving module and a TDMA-system receiver are adapted to broadening of bands of received signals and low frequencies of intermediate frequency signals. These apparatuses can be made compact and contribute to cost reduction. The receiving module is constituted of a low-noise amplifier, a high frequency LC filter, a Gilbert-cell type mixer, and baluns. A signal received by an antenna is amplified by the low-noise amplifier and is passed through the LC filter. After that, the signal is mixed with a local oscillation signal by the Gilbert-cell type mixer to be converted into an intermediate frequency signal.

Claims

1. A receiving module comprising:

a multi-layer substrate including a plurality of layers laminated together, the multi-layer substrate including a low-noise amplifier, an LC filter, a balun and a mixer connected to each other in series;

the low-noise amplifier amplifies a signal received by an antenna;

the mixer mixes the amplified signal with a local oscillation sign and outputs an intermediate frequency signal;

the mixer being a Gilbert-cell type mixer; and

the LC filter includes an inductor and a capacitor, the inductor and the capacitor being disposed within the multi-layer substrate.

2. A receiver comprising:

the receiving module according to claim 1;

an antenna which supplies said received signal to said low-noise amplifier;

a local oscillator which supplies said local oscillation signal to said mixer; and

a demodulator which receives and demodulates said intermediate frequency signal from said mixer.

3. The receiving module according to claim 1, wherein the balun includes an inductor and a capacitor, and the inductor of the balun is provided within the multi-layer substrate.

4. The receiving module according to claim 3, wherein the inductor of the LC filter, the capacitor of the LC filter and the inductor of the balun are respectively provided on different layers of said plurality of layers of said multi-layer substrate.

5. The receiving module according to claim 3, wherein the inductor of the LC filter and the capacitor of the LC filter are disposed in a lower portion of the multi-layer substrate, and the inductor of the balun is disposed in an upper portion of the multi-layer substrate.

6. The receiving module according to claim 5, wherein the inductor of the LC filter is opposed to the inductor of the balun via the capacitor of the LC filter.

7. The receiving module according to claim 3, wherein the capacitor of the balun is mounted on an upper surface of the multi-layer substrate.

8. The receiving module according to claim 1, wherein the low-noise amplifier and the Gilbert-cell type mixer are integrated in a single integrated circuit.

9. The receiving module according to claim 8, wherein the multi-layer substrate includes a cavity, and the integrated circuit is disposed in the cavity.

10. The receiving module according to claim 9, wherein the cavity is provided on the lower surface of the multi-layer substrate.

11. The receiving module according to claim 1, wherein the balun is provided between the low-noise amplifier and the Gilbert-cell type mixer.

12. The receiving module according to claim 11, wherein the LC filter is provided between the low-noise amplifier and the balun.