Michel J Frechette

6646498, Nov 11, 2003

Dec 18, 2001

10/026280

Ahmed N. Mohieldin - College Station TX
Abdellatif Bellaouar - Dallas TX
Sherif Embabi - Plano TX
Michel Frechette - Plano TX

Texas Instruments Incorporated - Dallas TX

H03K 500

327553, 327552

An integrated circuit (ICT) comprising a filter ( ). The filter comprises an input ( +) for receiving an input signal and an output ( ) for producing an output signal having a frequency cutoff point. The filter further comprises at least one resistor network (RN ) coupled between the input and the output. The resistor network comprises a first non-switched resistance (R ) and a first resistance series connection connected in parallel with the first non-switched resistance. The first resistance series connection comprises a switched resistance (R ) connected in series with a source/drain path of a switching transistor (TRR ), the switching transistor having a gate for receiving a control signal. The frequency cutoff point is adjustable in response to the control signal. Additionally, the switched resistance has a first resistance and the switching transistor has an on-resistance.

7440491, Oct 21, 2008

Jan 16, 2004

10/759480

Jaiganesh Balakrishnan - Dallas TX, US
Anuj Batra - Dallas TX, US
Anand G. Dabak - Plano TX, US
Abdellatif Bellaouar - Dallas TX, US
Paul H. Fontaine - Richardson TX, US
Michel Frechette - Plano TX, US
Ranjit Gharpurey - Ann Arbor MI, US

Texas Instruments Incorporated - Dallas TX

H04B 1/00

375148, 375137, 375147, 375316, 375324, 375349, 341122

System for ultra-wideband communications providing high data rates over an extended operating range in the presence of interferers. A preferred embodiment comprises an ultra-wideband (UWB) device that makes use of a portion of the UWB frequency range to help provide good performance in the presence of interferers. Additionally, since only a portion of the UWB frequency range is used, multiple devices can simultaneously transmit and receive by using different portions of the UWB frequency range.

8179198, May 15, 2012

Jul 21, 2010

12/840933

Abhijit Kumar Das - Dallas TX, US
Michel Frechette - Plano TX, US

Texas Instruments Incorporated - Dallas TX

H03G 3/10

330285, 330254

A variable gain amplifier may include a master amplifier that may be configured to generate a first current and a diode coupled with the master amplifier so that the first current passes through the diode which, when the first current is passing through the diode, generates a diode voltage signal. According to embodiments, an error amplifier may include a first input configured to receive a gain control voltage signal and a second input configured to receive the diode voltage signal. The output of the error amplifier may provide a feedback signal. The amplifier may include a circuit configured to generate at least one voltage control signal based on the feedback signal and a slave amplifier configured to adjust a gain amount based on the at least one voltage control signal.

20070249303, Oct 25, 2007

Apr 24, 2006

11/409092

Abdellatif Bellaouar - Richardson TX, US
Michel Frechette - Plano TX, US

H01Q 11/12
H04B 1/28

455127200, 455333000

A CMOS automatic gain control (AGC) circuit that receives an analog control voltage and generates a temperature compensated gain voltage to linearly control the gain of a variable gain circuit operating in the sub-threshold region. A PTAT circuit having a resistor network coupled to a current mirror circuit operating in the sub-threshold region establishes a current having an proportional relationship to temperature. This current is used as a supply for a voltage to voltage converter circuit which generates an intermediate voltage in response to the analog control voltage. A linearizing circuit operating in the sub-threshold region pre-conditions the intermediate voltage, which is then applied to a variable gain circuit. The variable gain circuit is operated in the sub-threshold region, and the preconditioned intermediate voltage will control the amount of gain to be substantially linear with respect to the analog control voltage, and with a range of about 85 dB.

20100029228, Feb 4, 2010

Dec 20, 2007

12/520518

Alan Holden - McKinney TX, US
Hamid Safiri - Plano TX, US
Michel J.G.J.P. Frechette - Plano TX, US
Sherif H.K. Embabi - Plano TX, US
Abdellatif Bellaouar - Richardson TX, US
Stephen Arnold Devison - Waterloo, CA
Tajinder Manku - Waterloo, CA

H04B 1/04

4551271

A power ramping circuit for use in the transmit path of a radio frequency (RF) circuit. The power ramping circuit includes parallel connected transistors used as logarithmic resistor attenuators for adjusting current to a mixer circuit in the transmit path. The parallel connected transistors can be sized differently, and are sequentially turned off to gradually increase the current provided to the mixer circuit. A ramp control circuit controls the parallel connected transistors in response to either an analog signal or a digital signal.

20100093291, Apr 15, 2010

Dec 20, 2007

12/520513

Sherif H.K. Embabi - Plano TX, US
Abdellatif Bellaouar - Richardson TX, US
Michel J.G.J.P. Frechette - Plano TX, US

H04B 1/04

4551272

An adaptive current control circuit for reduced power consumption and minimized gain shift in a variable gain amplifier. An automatic gain control circuit provides gain control voltages in response to a gain control signal. The gain control voltages are used by the variable gain amplifier to set the gain of the output signal for wireless transmit operations. The adaptive current control circuit receives the same gain control voltages for reducing current to the variable gain amplifier during low gain operation, while providing higher currents during high gain operation. The current that is provided is a hybrid mix of proportional to absolute temperature (PTAT) current and complementary to absolute temperature (CTAT) current for minimizing temperature effects on the gain. The ratio of PTAT current and CTAT current is adjustable for specific temperature ranges to further minimize temperature effects on the gain.

20110171994, Jul 14, 2011

Jan 8, 2010

12/684134

Gireesh RAJENDRAN - Trivandrum, IN
Timothy Don DAVIS - Arlington TX, US
Apu SIVADAS - Bangalore, IN
Michel FRECHETTE - Plano TX, US
Thiagarajan KRISHNASWAMY - Bangalore, IN
Salvatore PENNISI - Allen TX, US
Rakesh KUMAR - Ghazipur, IN
Bijit Thakorbhai PATEL - Allen TX, US
Subhashish MUKHERJEE - Bangalore, IN
Debapriya SAHU - Bangalore, IN

Texas Instruments Incorporated - Dallas TX

H04W 88/06

4555521

Multi-mode transceiver and a circuit for operating the multi-mode transceiver. A multi-mode transceiver includes a first circuit that is configurable to operate as one of a transmitter and a receiver in a first mode, and a second circuit that is configurable to operate as one of the transmitter and the receiver in a second mode. The multi-mode transceiver includes a first element coupled to the first circuit. The multi-mode transceiver includes a second element coupled to the first element and one or more ports. The multi-mode transceiver also includes a first switch, coupled to the second element and to the second circuit, that is configurable to operate the transceiver in at least one of the first mode and the second mode in conjunction with the first element and the second element.

61847232, Feb 6, 2001

Mar 3, 1999

9/261590

Michel Frechette - Plano TX
Maher A. Abuzaid - Plano TX

Texas Instruments Incorporated - Dallas TX

H03K 522

327 68

A system and method for converting an analog control voltage to a PTAT current. A plurality of differential transistor pairs is provided, each differential pair including a reference transistor and a non-reference transistor, each transistor having a current path and a control electrode. A first output is coupled to a first end of the current path of each of said non-reference transistors and output means is coupled to a first end of the current path of each of the reference transistors. A plurality of current sources is provided, one current source for each differential pair, each current source having a current path coupled to an opposing end of the current path of a different one of the transistor pairs and a control electrode. A PTAT current generator is coupled to the control electrode of each of the current sources. Each differential pair is provided with a pair of electron emitting electrodes coupled together, the current source being coupled to the electron emitting electrodes.