公开(公告)号：IT8548041D0

公开(公告)日：1985-05-03

申请号：IT4804185

申请日：1985-05-03

Applicant: MOTOROLA INC

Inventor： GRAY RANDALL C ,  JARRET ROBERT B

IPC: H03K17/082 ,  H03K17/615 ,  G01R

公开(公告)号：DE3272763D1

公开(公告)日：1986-09-25

申请号：DE3272763

申请日：1982-11-15

Applicant: MOTOROLA INC

Inventor： GRAY RANDALL C ,  MAIN W ERIC

IPC: G01F23/26 ,  G01N27/22 ,  G01N33/28 ,  G01R27/26

Abstract: A reference capacitor is coupled in parallel with a capacitor of which the size thereof is variable and an oscillator is used to alternately charge and discharge both capacitors between first and second voltage levels. The absolute magnitude of the current flowing through the reference capacitor, which varies in proportion to the size of the variable capacitor, is detected which is indicative of the variations in size of the variable capacitor. If the variable capacitor is disposed in the fuel tank of a vehicle, water in the fuel will cause the effective capacitance value of the capacitor to increase which reduces the absolute magnitude of the current that is detected. The absolute magnitude of the detected current can be utilized to indicate excessive water levels in the fuel.

公开(公告)号：DE69716349D1

公开(公告)日：2002-11-21

申请号：DE69716349

申请日：1997-06-25

Applicant: MOTOROLA INC

Inventor： BENNETT PAUL T ,  GRAY RANDALL C

IPC: B60R21/16 ,  B60R21/01 ,  B60R21/32

Abstract: An air bag deployment system (10) generates the proper current to activate a squib (74) and deploy an air bag. A separate capacitor (48) powers circuitry in a drive limit controller (54) for providing a variable voltage drive to a MOS device (68) to regulate squib (74) firing current. A switch circuit (38) supplies gate current to a transistor (46) such that an electrical connecting path allows a capacitor (22) to charge a capacitor (48). During squib (74) firing and air bag deployment, the switch circuit (38) provides electrical isolation between the decaying voltage stored on the capacitor (22) that powers the squib (74) current and the capacitor (48) that provides current regulation to the squib (74) from the drive limit controller (54).

公开(公告)号：IT1181852B

公开(公告)日：1987-09-30

申请号：IT4754685

申请日：1985-01-15

Applicant: MOTOROLA INC

Inventor： GRAY RANDALL C

IPC: H03K3/2893 ,  H03K17/30 ,  H03K

Abstract: In a zener referenced voltage threshold detector, the voltage at which a switching transistor turns on is determined by the breakdown voltage of a zener diode coupled between ground and the base of the switching transistor in conjunction with the base-emitter voltage of the switching transistor itself. In order to render the threshold detector circuit immune from noise at the trip point, a portion of the switching transistor's collector current is supplied to a second transistor which when turned on reduces the voltage at the base of the switching transistor.

公开(公告)号：DE69009636D1

公开(公告)日：1994-07-14

申请号：DE69009636

申请日：1990-09-04

Applicant: MOTOROLA INC

Inventor： GRAY RANDALL C ,  JARRETT ROBERT

IPC: H02P9/04 ,  H02J7/16 ,  H02J7/24 ,  H02P9/30 ,  H02P9/10

Abstract: A regulator is responsive to an input signal proportional to the system supply voltage for adjusting the current flowing in the field windings of an electrical alternator (14) which controls the output power thereof. The primary regulation loop (22,23,26,30) of the regulator generates a pulse train having a duty cycle inversely proportional to the amplitude of the input signal while an oscillator provides a sawtooth signal at a predetermined frequency which controls the response frequency of the regulator. The regulator limits the rate of increase in the duty cycle of pulse train upon detecting a decrease in the system supply voltage by converting the duty cycle of the pulse train to a charging signal for developing a voltage across a capacitor (36) proportional to the duty cycle of the pulse train. The voltage across the capacitor is compared to the sawtooth signal and triggers a latch which disables the output signal of the regulator as the duty cycle lengthens in response to the decrease in the system supply voltage. The voltage across the capacitor is increased each oscillator cycle until the duty cycle reaches the value required to support the output, power of the alternator.

公开(公告)号：IT1181653B

公开(公告)日：1987-09-30

申请号：IT4804185

申请日：1985-05-03

Applicant: MOTOROLA INC

Inventor： GRAY RANDALL C ,  JARRET ROBERT B

IPC: H03K17/082 ,  H03K17/615 ,  G01R

公开(公告)号：IT8547546D0

公开(公告)日：1985-01-15

申请号：IT4754685

申请日：1985-01-15

Applicant: MOTOROLA INC

Inventor： GRAY RANDALL C

IPC: H03K3/2893 ,  H03K17/30 ,  H03K

Abstract: In a zener referenced voltage threshold detector, the voltage at which a switching transistor turns on is determined by the breakdown voltage of a zener diode coupled between ground and the base of the switching transistor in conjunction with the base-emitter voltage of the switching transistor itself. In order to render the threshold detector circuit immune from noise at the trip point, a portion of the switching transistor's collector current is supplied to a second transistor which when turned on reduces the voltage at the base of the switching transistor.

公开(公告)号：DE69716349T2

公开(公告)日：2003-03-20

申请号：DE69716349

申请日：1997-06-25

Applicant: MOTOROLA INC

Inventor： BENNETT PAUL T ,  GRAY RANDALL C

IPC: B60R21/16 ,  B60R21/01 ,  B60R21/32

Abstract: An air bag deployment system (10) generates the proper current to activate a squib (74) and deploy an air bag. A separate capacitor (48) powers circuitry in a drive limit controller (54) for providing a variable voltage drive to a MOS device (68) to regulate squib (74) firing current. A switch circuit (38) supplies gate current to a transistor (46) such that an electrical connecting path allows a capacitor (22) to charge a capacitor (48). During squib (74) firing and air bag deployment, the switch circuit (38) provides electrical isolation between the decaying voltage stored on the capacitor (22) that powers the squib (74) current and the capacitor (48) that provides current regulation to the squib (74) from the drive limit controller (54).

公开(公告)号：DE69009636T2

公开(公告)日：1994-12-22

申请号：DE69009636

申请日：1990-09-04

Applicant: MOTOROLA INC

Inventor： GRAY RANDALL C ,  JARRETT ROBERT

IPC: H02P9/04 ,  H02J7/16 ,  H02J7/24 ,  H02P9/30 ,  H02P9/10

Abstract: A regulator is responsive to an input signal proportional to the system supply voltage for adjusting the current flowing in the field windings of an electrical alternator (14) which controls the output power thereof. The primary regulation loop (22,23,26,30) of the regulator generates a pulse train having a duty cycle inversely proportional to the amplitude of the input signal while an oscillator provides a sawtooth signal at a predetermined frequency which controls the response frequency of the regulator. The regulator limits the rate of increase in the duty cycle of pulse train upon detecting a decrease in the system supply voltage by converting the duty cycle of the pulse train to a charging signal for developing a voltage across a capacitor (36) proportional to the duty cycle of the pulse train. The voltage across the capacitor is compared to the sawtooth signal and triggers a latch which disables the output signal of the regulator as the duty cycle lengthens in response to the decrease in the system supply voltage. The voltage across the capacitor is increased each oscillator cycle until the duty cycle reaches the value required to support the output, power of the alternator.

公开(公告)号：HK23991A

公开(公告)日：1991-04-04

申请号：HK23991

申请日：1991-03-26

Applicant: MOTOROLA INC

Inventor： GRAY RANDALL C ,  JOSEPH ERIC D

IPC: H03F3/45 ,  G05F3/26 ,  H02H3/087 ,  H03F3/343 ,  H03K5/08 ,  H03F3/347

Abstract: A circuit (10) for detecting a very large output current threshold with respect to a low reference current. The threshold detector circuit includes a multiple transistor circuit (16,18) wherein a pair of emitter areas are ratioed with respect to each other, and which have common bases, and an error amplifier (26, 28, 32, 34) the inputs of which are connected to the respective emitters of the multiple transistor circuit. An output current is sourced from the emitter of the multiple transistor circuit (16, 18) having the larger area which output current is a function of the load coupled therewith to thereby produce a voltage at this emitter the magnitude thereof being a function of the output current. The current sourced from the other emitter of the multiple transistor circuit (16, 18) to the additional input of the error amplifier (26, 28, 32, 34) is proportional to the bias current (IREF) sourced therefrom by the error amplifier whereby the error amplifier (26,28,32,34) effectfully monitors the emitter voltages of the multiple transistor circuit (16, 18) to provide an error signal the sense of which switches as the output toad current varies above and below a threshold value that is a function of the magnitude of the reference current.