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    A HIGH SPEED CMOS COMPARATOR CIRCUIT
    1.
    发明专利
    A HIGH SPEED CMOS COMPARATOR CIRCUIT 未知

    公开(公告)号：DE3279334D1

    公开(公告)日：1989-02-09

    申请号：DE3279334

    申请日：1982-07-14

    Applicant: MOTOROLA INC

    Inventor： BARKER CHARLES E ,  SMITH MICHAEL D

    IPC: H03K5/153 ,  H03K3/02 ,  H03K19/003 ,  H03K19/0948 ,  H03K19/094

    Abstract: A high speed comparator comprising an operational amplifier and two inverter portions is provided. The output voltage of the operational amplifier biases a control transistor coupled to the first inverter portion which is coupled to the operational amplifier in a closed loop. A stable reference voltage is coupled to an input of the operational amplifier and forces the switch point of the first inverter to be at the reference voltage. If the second inverter portion comprises transistors having the gate dimensions thereof sized the same as the transistors of the first inverter portion, the switch point of the second inverter is also at the reference voltage. The switch point of the fast comparator has thereby been isolated from process and temperature variations.

    Input buffer circuit for receiving multiple level input voltages
    3.
    发明专利
    Input buffer circuit for receiving multiple level input voltages 未知

    公开(公告)号：HK85495A

    公开(公告)日：1995-06-09

    申请号：HK85495

    申请日：1995-06-01

    Applicant: MOTOROLA INC

    Inventor： SMITH MICHAEL D ,  WHATLEY ROGER A ,  OLESIN ANDREW S

    IPC: H03K19/0175 ,  H03K19/0185 ,  H03K19/094

    Abstract: An input buffer circuit having a single input for receiving input voltages characterized by having varying voltage swings is provided. First and second inverter circuits having differing switchpoint voltages are coupled to a level shifting position. The level shifting portion varies the level of swing of the input voltage and buffers the input voltage. In one form, voltage coupling circuitry is interposed between the level shifting portion and a latching portion which provides the input voltage as an output signal at a predetermined voltage level. In another form, voltage coupling circuitry controlled by control circuitry couples the output of the level shifting portion to an output in response to the input voltage.

    4.
    发明专利
    未知

    公开(公告)号：IT1149051B

    公开(公告)日：1986-12-03

    申请号：IT4896382

    申请日：1982-08-09

    Applicant: MOTOROLA INC

    Inventor： BARKER CHARLES E ,  SMITH MICHAEL D

    IPC: H03K3/02 ,  H03K5/153 ,  H03K19/003 ,  H03K19/0948 ,  H03K

    Abstract: A high speed comparator comprising an operational amplifier and two inverter portions is provided. The output voltage of the operational amplifier biases a control transistor coupled to the first inverter portion which is coupled to the operational amplifier in a closed loop. A stable reference voltage is coupled to an input of the operational amplifier and forces the switch point of the first inverter to be at the reference voltage. If the second inverter portion comprises transistors having the gate dimensions thereof sized the same as the transistors of the first inverter portion, the switch point of the second inverter is also at the reference voltage. The switch point of the fast comparator has thereby been isolated from process and temperature variations.

    CURRENT SOURCE CIRCUIT HAVING REDUCED ERROR
    5.
    发明专利
    CURRENT SOURCE CIRCUIT HAVING REDUCED ERROR 未知

    公开(公告)号：CA1199688A

    公开(公告)日：1986-01-21

    申请号：CA443504

    申请日：1983-12-16

    Applicant: MOTOROLA INC

    Inventor： SMITH MICHAEL D

    IPC: G05F1/56 ,  G05F3/26 ,  G05F3/30 ,  G05F3/20 ,  H03K17/00

    Abstract: A CURRENT SOURCE CIRCUIT HAVING REDUCED ERROR A current source circuit which provides an output bias current having reduced error is disclosed. The current source has reference voltage and reference current portions coupled together for providing a reference current to an amplifier portion. A buffer portion is coupled to the amplifier portion and to a bias current portion for substantially increasing the output impedance of the amplifier portion thereby decreasing the effect of power supply variation on the output bias current.

    HIGH SPEED CMOS COMPARATOR CIRCUIT
    6.
    发明专利
    HIGH SPEED CMOS COMPARATOR CIRCUIT 未知

    公开(公告)号：CA1167116A

    公开(公告)日：1984-05-08

    申请号：CA407245

    申请日：1982-07-14

    Applicant: MOTOROLA INC

    Inventor： BARKER CHARLES E ,  SMITH MICHAEL D

    IPC: H03K5/153 ,  H03K3/02 ,  H03K19/003 ,  H03K19/0948 ,  G05B1/01

    Abstract: A HIGH SPEED CMOS COMPARATOR CIRCUIT A high speed comparator comprising an operational amplifier and two inverter portions is provided. The output voltage of the operational amplifier biases a control transistor coupled to the first inverter portion which is coupled to the operational amplifier in a closed loop. A stable reference voltage is coupled to an input of the operational amplifier and forces the switch point of the first inverter to be at the reference voltage. If the second inverter portion comprises transistors having the gate dimensions thereof sized the same as the transistors of the first inverter portion, the switch point of the second inverter is also at the reference voltage. The switch point of the fast comparator has thereby been isolated from process and temperature variations.

    INPUT BUFFER CIRCUIT FOR RECEIVING MULTIPLE LEVEL INPUT VOLTAGES
    7.
    发明专利
    INPUT BUFFER CIRCUIT FOR RECEIVING MULTIPLE LEVEL INPUT VOLTAGES 未知

    公开(公告)号：CA1201491A

    公开(公告)日：1986-03-04

    申请号：CA464599

    申请日：1984-10-03

    Applicant: MOTOROLA INC

    Inventor： SMITH MICHAEL D ,  WHATLEY ROGER A ,  OLESIN ANDREW S

    IPC: H03K19/0175 ,  H03K19/0185 ,  H03K19/094 ,  H03K19/092

    Abstract: INPUT BUFFER CIRCUIT FOR RECEIVING MULTIPLE LEVEL INPUT VOLTAGES An input buffer circuit (10) having a single input for receiving input voltages (VIN) characterized by having varying voltage swings is provided. First (12 and 15) and second (16 and 18) inverter circuits having differing switchpoint voltages are coupled to a level shifting portion (13, 17). The level shifting portion varies the level of swing of the input voltage (VIN) and buffers the input voltage (VIN). In one form, voltage coupling circuitry (22, 23) is interposed between the level shifting portion and a latching portion (25, 26) which provides the input voltage (VIN) as an output signal at a predetermined voltage level. In another form, voltage coupling circuitry (48, 53) controlled by control circuitry (49, 50, 57) couples the output of the level shifting portion (43, 44) to an output in response to the input voltage (VIN).

    8.
    发明专利
    未知

    公开(公告)号：IT8248963D0

    公开(公告)日：1982-08-09

    申请号：IT4896382

    申请日：1982-08-09

    Applicant: MOTOROLA INC

    Inventor： BARKER CHARLES E ,  SMITH MICHAEL D

    IPC: H03K3/02 ,  H03K5/153 ,  H03K19/003 ,  H03K19/0948 ,  H03K

    Abstract: A high speed comparator comprising an operational amplifier and two inverter portions is provided. The output voltage of the operational amplifier biases a control transistor coupled to the first inverter portion which is coupled to the operational amplifier in a closed loop. A stable reference voltage is coupled to an input of the operational amplifier and forces the switch point of the first inverter to be at the reference voltage. If the second inverter portion comprises transistors having the gate dimensions thereof sized the same as the transistors of the first inverter portion, the switch point of the second inverter is also at the reference voltage. The switch point of the fast comparator has thereby been isolated from process and temperature variations.

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