1
Ambrose W C Tam: Wireline interface for cellular telephone. Novatel Communications, Cesari and Mckenna, June 11, 1996: US05526403 (132 worldwide citation)

A wireline interface permitting a cellular telephone transceiver to originate and receive calls using both cellular and wireline services. The invention permits a subscriber unit to operate as a standard cellular telephone when it is disconnected from a land-based telephone line, and as both a full- ...


2
Ambrose W C Tam: RF amplifier system having multiple selectable power output levels. Astec International, McCubbrey Bartels Meyer & Ward, June 30, 1992: US05126686 (121 worldwide citation)

A control circuit for a radio frequency (rf) amplifier having multiple selectable power output levels in response to a plurality of input control signals is presented. The rf amplifier includes a variable gain input which is responsive to the control circuit. The control circuit includes an attenuat ...


3
Ambrose W C Tam: Circuit board assembly for a cellular telephone system or the like. Astec International, McCubbrey Bartels Meyer & Ward, April 21, 1992: US05107404 (85 worldwide citation)

A circuit board assembly for a cellular telephone system or the like is described. A housing encloses a printed circuit board. The housing comprises a frame including an outer wall surrounding the periphery of the printed circuit board and a pair of cover plates engaging the outer edges of the outer ...


4
Ambrose W C Tam: Digitally controlled variable resistor. Astec International, Arnold White & Durkee, September 3, 1991: US05045832 (45 worldwide citation)

A compact and inexpensive variable resistor circuit has a value of resistance that can be set by a data signal. The variable resistor includes a number of variable individual resistances connected in series, and an electronic switch connected in parallel across each individual resistance. The values ...


5
Ambrose W C Tam, Francis C N Lau: Setting of electronic circuits in a radio telephone. Astec International, Arnold White & Durkee, April 6, 1993: US05201063 (22 worldwide citation)

An electronic device has a circuit whose operation is adjustable by changing a variable component responsive to stored data. The electronic device also has a processor responsive to a stored program for controlling the circuit by receiving new input data and changing the variable component by replac ...


6
Ambrose W C Tam: RF coupler having non-overlapping off-set coupling lines. Astec International, McCubbrey Bartels Meyer & Ward, April 9, 1991: US05006821 (21 worldwide citation)

An improved radio frequency (RF) coupler for providing two or more secondary signals from a primary RF signal. The RF coupler has a primary coupling element and two or more secondary coupling elements for providing the two or more secondary signals. The secondary RF coupling elements are offset and ...


7
Slim Salah Souissi, Michael Scott Andrews, Ambrose W C Tam, John Andrew Adams: Distributed architecture wireless RF modem. Novatel Wireless, Foley & Lardner, August 9, 2005: US06928301 (9 worldwide citation)

The present invention provides for a wireless radio frequency (“RF”) modem that plugs into a host computer and shares a central processing unit and memory with the host computer, wherein principal modem functions are distributed between the modem and the host computer. In one embodiment, the modem p ...


8
Slim Salah Souissi, Michael Scott Andrews, Ambrose W C Tam, John Andrew Adams: Distributed architecure wireless RF modem. Novatel Wireless, AlbertDhand, May 17, 2011: US07945290 (1 worldwide citation)

The present invention provides for a wireless radio frequency (“RF”) modem that plugs into a host computer and shares a central processing unit and memory with the host computer, wherein principal modem functions are distributed between the modem and the host computer. In one embodiment, the modem p ...


9
Slim Salah Souissi, Michael Scott Andrews, Ambrose W C Tam, John Andrew Adams: Distributed architecture wireless RF modem. Novatel Wireless, Foley & Lardner, December 22, 2009: US07636585

The present invention provides for a wireless radio frequency (“RF”) modem that plugs into a host computer and shares a central processing unit and memory with the host computer, wherein principal modem functions are distributed between the modem and the host computer. In one embodiment, the modem p ...


10
Slim Salah Souissi, Michael Scott Andrews, Ambrose W C Tam, John Andrew Adams: Over the air RF wireless data modem programming. Coudert Brothers, June 27, 2002: US20020083432-A1

The present invention is directed at a method and apparatus for updating a detachable software configurable wireless radio frequency modem that uses operating software. The RF modem uses an attached host computing device to download an operating software update to the RF modem's memory to reconfigur ...