Edward W Macrobbie

56316038, May 20, 1997

Sep 29, 1995

8/536331

Frederic M. Stubbe - Irvine CA
Edward W. MacRobbie - Lake Forest CA
Daryush Shamlou - Laguna Niguel CA

Rockwell International Corporation - Seal Beach CA

H03F 345

330 9

A differential amplifier with improved offset cancellation is disclosed. The differential amplifier has a floating current source coupled to the drain terminals of the differential pair for providing complementary currents to cancel the offset voltage. In this way, the tail current in the differential pair is not affected by the offset cancellation and remains constant, while the common-mode offset is not worsened by the injected current.

55303986, Jun 25, 1996

Apr 11, 1994

8/226126

Daryush Shamlou - Laguna Niguel CA
Edward MacRobbie - Lake Forest CA
Rajiv Gupta - Brea CA
Raouf Halim - Laguna Niguel CA

Rockwell International Corporation - Seal Beach CA

H03L 500

327545

A circuit for converting a system supply voltage having one of two levels to a voltage for use by an integrated analog circuit connected to the system upon power-up. The circuit uses a diode-connected transistor to generate a reference voltage necessary for a regulator to regulate the supply voltage when the supply voltage is first powered up. The regulated supply voltage is doubled to a voltage level sufficient to activate the integrated analog circuit's bandgap voltage. The activated bandgap voltage is thus switched on to supply a more precise reference voltage to the regulator so that the diode-connected transistor may be de-activated to conserve power. The circuit also provides a bypass path for connecting the supply voltage directly to the integrated analog circuit when the supply voltage is the same level as the necessary voltage for the integrated analog circuit.

55325769, Jul 2, 1996

Apr 11, 1994

8/226197

Edward MacRobbie - Lake Forest CA
Daryush Shamlou - Laguna Niguel CA
Rajiv Gupta - Brea CA
Raouf Halim - Laguna Niguel CA

Rockwell International Corporation - Seal Beach CA

G05F 1575

323274

An on-board regulated voltage up-convertor for converting a first DC voltage at a first node from an electronic system to a second DC voltage for an integrated device at a second node. The convertor comprises reference generator means for generating a predetermined reference voltage at start-up, voltage regulator means coupled to said first node for regulating said first voltage at a predetermined voltage at a third node, voltage multiplier means coupled to said third node and to said second node for multiplying said predetermined voltage to generate an output voltage substantially equal to said second voltage, feedback means coupled to said second node for feeding said output voltage back to said voltage regulator means to adjust the level of said predetermined voltage at said third node according to how said output voltage is relative to said second voltage.