GILBERTO HERNANDEZ
Medical Practice in Miami, FL

6768398, Jul 27, 2004

Dec 12, 2001

10/021636

Gilberto Jacinto Hernandez - Miami FL
Douglas Harold Weisman - Sunrise FL

Motorola, Inc. - Schaumburg IL

H01P 1203

333204, 333202, 333 34

A transmission line ( ) is formed to have a characteristic impedance which increases at a first substantially exponential rate with respect to a distance from the input ( ). A plurality of resonators ( ) are coupled to the transmission line and positioned at a plurality of locations along the transmission line. The plurality of resonators has resonant frequencies that decrease at a second substantially exponential rate with respect to the distance from the input. An output signal ( ) is obtained at a point in the filter that produces a filter response having a corner frequency.

6441701, Aug 27, 2002

Sep 22, 1999

09/405099

Gilberto J. Hernandez - Miami FL

Motorola, Inc. - Schaumburg IL

H03H 701

333171, 333174, 333175

A tunable filter ( ) includes first ( ) and second ( ) “bridged-T” resonators. The first ( ) and second ( ) resonators are capacitively coupled together via bandwidth control/coupling section ( ). A biasing section ( ) provides the proper biasing and decoupling for the filter ( ). Filter ( ) provides for low-side injection mode operation, and provides for a very deep zero on the lower side of the passband resulting in excellent selectivity. Filter ( ) provides for excellent selectivity while reducing the number of inductors and varactors needed in the filter circuit. A high side injection mode filter ( ) similar to filter ( ) is also described in the disclosure.

6097269, Aug 1, 2000

Feb 1, 1999

9/241667

Gilberto J. Hernandez - Miami FL

Motorola, Inc. - Schaumburg IL

H03H 701

333174

A tunable filter (400) provides dual injection mode operation over a continuously tunable frequency range (500). A combination of mirrored series resonant circuits (432, 446) tuned through varactors (434, 448) allows the frequency response to shift. The use of a series capacitor and shunted inductor (430, 428), (444, 442) mirrored onto each series resonator (432, 446) provides both high-side and low-side injection protection.

2002018, Dec 5, 2002

Jul 8, 2002

10/191266

Gilberto Hernandez - Miami FL, US

H03H007/01

333/174000, 333/170000

A tunable filter () includes first () and second () “bridged-T” resonators. The first () and second () resonators are capacitively coupled together via bandwidth control/coupling section (). A biasing section () provides the proper biasing and decoupling for the filter (). Filter () provides for low-side injection mode operation, and provides for a very deep zero on the lower side of the passband resulting in excellent selectivity. Filter () provides for excellent selectivity while reducing the number of inductors and varactors needed in the filter circuit. A high side injection mode filter () similar to filter () is also described in the disclosure.

7417517, Aug 26, 2008

Jul 13, 2006

11/457238

Gilberto J. Hernandez - Miami FL, US
Douglas H. Weisman - Sunrise FL, US

Motorola, Inc. - Schaumburg IL

H01P 1/20

333204, 333 34, 333202

A method and apparatus for a highpass filter structure using transmission line construction which has multiple output tabs for selection of corner frequencies utilizing a plurality of resonators coupled to the transmission line. The transmission line has a characteristic impedance which increases exponentially with respect to a distance from the input.