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71. 发明专利

JPH02134575A POWER SUPPLY CURRENT MEASURING CIRCUIT 失效
公开(公告)号：JPH02134575A
公开(公告)日：1990-05-23
申请号：JP28867988
申请日：1988-11-15
申请人： ANALOG DEVICES INC
发明人： MORIWAKI IKURO
IPC分类号： G01R19/00
摘要： PURPOSE:To operate a differential amplifier for measuring the magnitude of the current flowing in or flowing out from a power supply by the voltage of the power supply by differentially amplifying the voltages at both terminals of the resistor inserted in a power supply line. CONSTITUTION:The resistor Rs inserted in a power supply line 2 in order to detect the current (i) of a power supply, a pair of the first and second voltage dividing circuits 3, 4 for dividing the voltages at the respective terminals of the resistor Rs and the differential amplifier 6 connected to the voltage dividing points of the respective circuits 3, 4 through a pair of the input terminals 6a, 6b are mounted and the detection output corresponding to the current (i) of the power supply is obtained from the output of the amplifier 6. The voltages at both terminals of the current detecting resistor Rs are dropped by the circuits 3, 4 to be respectively applied to the reversal and non-reversal input terminals 6a, 6b of the amplifier 6. As a result, since the voltages v1, v2 inputted to the amplifier 6 can be made considerably lower than the voltage E of the power supply 1, operation voltage is applied to the differential amplifier from the power supply 1 to make it possible to operate said amplifier.

72. 发明专利

JPH02104026A HIGH SPEED DIGITAL/ANALOG CONVERTER 失效
公开(公告)号：JPH02104026A
公开(公告)日：1990-04-17
申请号：JP14821089
申请日：1989-06-09
申请人： ANALOG DEVICES INC
发明人： MIKAERU JII TATSUCHIRU
IPC分类号： H03M1/74 , H03M1/78
摘要： PURPOSE: To improve the performance of a converter for such as high speed processing and error reduction by configuring the same cells of the D/A converter with bipolar transistors(TRs). CONSTITUTION: The D/A converter is made up of the same DAC cell groups 10A, 10B, 10C. The DAC cell 10 is made up of a PNP transistor(TR) current source 14 having a register 16 connecting between an emitter and a voltage supply line VDD. Since a PMOS TR is stored in a saturating stage, a change in a voltage of a ladder circuit network 44 does not give any effect onto a source voltage of the PMOS TR. Since there is a buffer operation of PMOS witches 34, 36, a recovery time after the change in an input code is reduced. A MOS switch circuit 38 is wired to be operated in the make-before-brake sequence.

73. 发明专利

JPS63134944A HUMIDITY DETECTER 失效
公开(公告)号：JPS63134944A
公开(公告)日：1988-06-07
申请号：JP28225086
申请日：1986-11-27
申请人： ANALOG DEVICES INC
发明人： MORIWAKI IKURO
IPC分类号： G01N27/22
摘要： PURPOSE:To offset an influence of an external noise and a phenomenon of a connected part of different kinds of metals, by constituting a humidity sensing part of two pieces of capacitors, and obtaining a for detecting a humidity variation in the air as a capacity variation of a capacitor, and obtaining a capacity difference output as a bridge circuit. CONSTITUTION:A humidity sensing part 1 is provided with two pieces of capacitors in which the capacity of one of them is varied when humidity in the air is varied. By connecting the humidity sensing part 1 to an AC bridge circuit 4 so that outputs between the respective capacitors C1, C2 are negated each other, the AC bridge circuit 4 is constituted for generating an error voltage being proportional to a capacity difference between two pieces of capacitors of the humidity sensing part 1. The error voltage corresponding to this capacity difference is brought to a synchronous detection by a synchronous detection circuit 8 and a DC signal voltage is obtained.

74. 发明专利

JPS6325572A LEAKAGE CURRENT MEASURING SYSTEM OF ELECTROMETER AMPLIFIER 失效
公开(公告)号：JPS6325572A
公开(公告)日：1988-02-03
申请号：JP14130587
申请日：1987-06-05
申请人： ANALOG DEVICES INC
发明人： GURETSUGU EI BATORAA
IPC分类号： G01R31/00 , G01R19/00 , G01R31/02 , G01R35/02
摘要： A circuit for measuring the leakage current of an electrometer amplifier 10 determines the leakage currents at both amplifier input terminals simultaneously by a method that eliminates the effects of the amplifier offset voltage as well as of the offset voltages and leakage currents of the amplifiers (22 and 40) used in the measurement. With no amp. under test present in the circuit, measurements are made of the outputs of the two test-circuit amplifiers (22 and 40). This results in quantities that indicate the required compensation for the offset voltages and leakage currents of the test-circuit amplifiers. From then on, measurements are made of the amplifier output voltages with an amp. under test present and the leakage currents at both input terminals of said amplifier 10 under test can be inferred from these second measurements by using the information obtained from the first set of measurements. Subsequent tests of other amplifiers under test can be made without re-measurement of the compensation information obtained with no amplifier under test present.

75. 发明专利

JPS6238894B2 失效
公开(公告)号：JPS6238894B2
公开(公告)日：1987-08-20
申请号：JP3174986
申请日：1986-02-15
申请人： ANALOG DEVICES INC
发明人： ADORIAN HOORU BUROOKAU
IPC分类号： H03M1/06 , G05F3/26 , H03M1/00 , H03M1/74 , H03M1/78

76. 发明专利

JPS61208866A INSULATION AMPLIFIER OF HYBRID IC 失效
公开(公告)号：JPS61208866A
公开(公告)日：1986-09-17
申请号：JP5115285
申请日：1985-03-14
申请人： ANALOG DEVICES INC
发明人： MORIWAKI IKURO , TANIGUCHI SHINJI
IPC分类号： H01L25/18 , H01L25/04 , H05K1/18 , H05K3/30
摘要： PURPOSE:To minimize an area of fitting while securing a sufficient insulation distance between primary and secondary circuits of a transformer, by disposing a group of terminals of the primary circuit of the transformer and a group of terminals of the secondary circuit thereof serially in one row, at a prescribed interval between them and along one side edge in the longitudinal direction of an IC package. CONSTITUTION:IC 1 is constructed, by using a single line package, in such a manner that terminal groups 2a and 2b arranged in one serial row are disposed along the side edge in deviation onto one side 1a in the longitudinal direction. The terminal group 2a comprises primary-circuit terminals including an input terminal, a clock terminal, etc., while the terminal group 2b comprises secondary-circuit terminals including an output terminal, a control terminal, etc. These primary and secondary terminal groups 2a and 2b are spaced from each other at a sufficient insulation distance in the longitudinal direction of IC 1. According to this constitution, a packaging density can be increased with a sufficient insulation distance secured between IC terminals in the case when a large number of hybrid ICs with insulation amplifiers incorporated therein are juxtaposed to transmit multichannel signals.

77. 发明专利

JPS6058613B2 失效
公开(公告)号：JPS6058613B2
公开(公告)日：1985-12-20
申请号：JP8314174
申请日：1974-07-19
申请人： ANALOG DEVICES INC
发明人： AIBAA UORUDO
IPC分类号： H03M1/52 , G01D5/249 , H03M1/00

78. 发明专利

JPS6013338B2 失效
公开(公告)号：JPS6013338B2
公开(公告)日：1985-04-06
申请号：JP3078476
申请日：1976-03-19
申请人： ANALOG DEVICES INC
发明人： MADORIAN HOORU BUROOKAU
IPC分类号： H03M1/06 , G05F3/26 , H03M1/00 , H03M1/74 , H03M1/78

79. 发明专利

JPS59214321A Power mode cmos d/a converter of wide reference range 失效
标题翻译： POWER MODE CMOS D / A转换器，宽参考范围
公开(公告)号：JPS59214321A
公开(公告)日：1984-12-04
申请号：JP2303384
申请日：1984-02-13
申请人： Analog Devices Inc
发明人： MIKAERU JII TATEIRU , PASUKARU MAINOGU
IPC分类号： H03M1/74 , H03K17/693 , H03M1/00 , H03M1/78 , H03K13/05
CPC分类号： H03M1/74

80. 发明专利

JPS5978502A Matching of thin film resistor 失效
标题翻译：薄膜电阻的匹配
公开(公告)号：JPS5978502A
公开(公告)日：1984-05-07
申请号：JP17446183
申请日：1983-09-22
申请人： Analog Devices Inc
发明人： ADORIAN POORU BURAKAU
IPC分类号： H01C13/02 , H01C17/22 , H01L27/01 , H01L27/08
CPC分类号： H01L27/0802 , H01C17/22 , Y10T29/49083

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