Ramon M Gomez

US Patent:

7199664, Apr 3, 2007

Filed:

Dec 27, 2004

Appl. No.:

11/020478

Inventors:

Klaas Bult - Bosch en Duin, NL
Ramon A. Gomez - Fountain Valley CA, US

Assignee:

Broadcom Corporation - Irvine CA

International Classification:

H03G 3/10

US Classification:

330284, 333 81 R, 4552321

Abstract:

An integrated receiver with channel selection and image rejection substantially implemented on a single CMOS integrated circuit is described. A receiver front end provides programable attenuation and a programable gain low noise amplifier. Frequency conversion circuitry advantageously uses LC filters integrated onto the substrate in conjunction with image reject mixers to provide sufficient image frequency rejection. Filter tuning and inductor Q compensation over temperature are performed on chip. The filters utilize multi track spiral inductors. The filters are tuned using local oscillators to tune a substitute filter, and frequency scaling during filter component values to those of the filter being tuned. In conjunction with filtering, frequency planning provides additional image rejection. The advantageous choice of local oscillator signal generation methods on chip is by PLL out of band local oscillation and by direct synthesis for in band local oscillator.

US Patent:

7728664, Jun 1, 2010

Filed:

Nov 19, 2007

Appl. No.:

11/984512

Inventors:

Stephen Edward Krafft - Los Angeles CA, US
Ertan Zencir - Irvine CA, US
Stefano Bozzola - Genoa, IT
Ramon Alejandro Gomez - San Juan Capistrano CA, US

Assignee:

Broadcom Corporation - Irvine CA

International Classification:

H03G 3/20

US Classification:

330140, 330147

Abstract:

Satellite set-top boxes (STB) are increasingly being designed with multiple tuners, making them capable of receiving more than one program at a time. In addition, satellite STBs are increasingly being designed with multiple inputs, to permit reception of additional channels that will not fit within the conventional satellite intermediate frequency (IF) band (950-2150 MHz). Often, the STB must route these multiple inputs to the multiple tuners with some form of switching function, to allow each tuner to receive all channel bands. Accordingly, the invention includes an RFIC with two RF inputs and three RF outputs, and a crossbar switch that can route any input to any output. The two inputs are amplified by low-noise amplifier stages.

US Patent:

20150008982, Jan 8, 2015

Filed:

Sep 30, 2013

Appl. No.:

14/042274

Inventors:

- Irvine CA, US
Delong Cui - Tustin CA, US
Jun Cao - Irvine CA, US
Afshin Doctor Momtaz - Laguna Hills CA, US
Iuri Mehr - Irvine CA, US
Ramon Alejandro Gomez - San Juan Capistrano CA, US

Assignee:

Broadcom Corporation - Irvine CA

International Classification:

H03F 1/32

US Classification:

330260, 330295, 29600

Abstract:

Techniques are described herein that adaptively suppress harmonic distortion in an amplifier utilizing negative gain. The amplifier includes a first amplifier stage and a second amplifier stage, which are coupled in parallel. The first amplifier stage has a positive gain. The second amplifier stage has a negative gain to suppress total harmonic distortion of a system that includes the amplifier. The amplifier further includes shunt-peaking circuitry coupled to the first amplifier stage and the second amplifier stage to increase a maximum operating frequency at which the amplifier is capable of operating.