Pyridine derivatives and their herbicidal compositions
    4.
    发明授权
    Pyridine derivatives and their herbicidal compositions 失效
    吡啶衍生物及其除草组合物

    公开(公告)号:US4696694A

    公开(公告)日:1987-09-29

    申请号:US882408

    申请日:1986-07-07

    摘要: A pyridine derivative having the formula: ##STR1## wherein one of A, B, D and E is oxygen, sulfur, --SO--, --SO.sub.2 --, --NR.sup.3 --, ##STR2## or .dbd.CH-- with the rest being all carbon atoms; X is halogen, C.sub.1 -C.sub.4 alkyl, C.sub.1 -C.sub.4 alkoxy, C.sub.1 -C.sub.4 haloalkyl, C.sub.1 -C.sub.4 haloalkoxy, C.sub.1 -C.sub.4 alkylthio, C.sub.1 -C.sub.4 haloalkylthio, C.sub.1 -C.sub.4 alkoxycarbonyl, C.sub.1 -C.sub.4 alkylthioalkyl, tetrahydrothiopyranyl, hydroxyl, CF.sub.3, phenyl or pyridyl; n is an integer of from 0 to 6,; W is oxygen or sulfur; R is hydrogen, di-lower alkylimino, C.sub.1 -C.sub.5 alkyl, C.sub.2 -C.sub.5 alkenyl, C.sub.2 -C.sub.5 alkynyl, C.sub.4 or C.sub.5 oxacycloalkyl, C.sub.2 -C.sub.5 mono-, di- or tri-haloalkenyl, C.sub.2 -C.sub.5 haloalkynyl, glycidyl, furfuryl, alkylthioalkyl, C.sub.3 -C.sub.6 cycloalkyl or a cation R.sup.1 is C.sub.1 -C.sub.4 alkyl, R.sup.2 is C.sub.1 -C.sub.4 alkyl or C.sub.3 -C.sub.6 cycloalkyl, or R.sup.1 and R.sup.2 together with the ajacent carbon atom, form C.sub.3 -C.sub.6 cycloalkyl; and R.sup.3 is hydrogen or C.sub.1 -C.sub.3 alkyl. The compounds are used as herbicides.

    摘要翻译: 具有下式的吡啶衍生物:其中A,B,D和E中的一个为氧,硫,-SO-,-SO 2 - ,-NR 3 - ,X 3 =或CH-,其余为 全部为碳原子; X是卤素,C 1 -C 4烷基,C 1 -C 4烷氧基,C 1 -C 4卤代烷基,C 1 -C 4卤代烷氧基,C 1 -C 4烷硫基,C 1 -C 4卤代烷硫基,C 1 -C 4烷氧羰基,C 1 -C 4烷硫基烷基,四氢噻喃基,羟基,CF 3, 苯基或吡啶基; n为0〜6的整数; W是氧或硫; R是氢,二低级烷基亚氨基,C 1 -C 5烷基,C 2 -C 5烯基,C 2 -C 5炔基,C 4或C 5环烷基,C 2 -C 5单 - ,二 - 或三 - 卤代烯基,C 2 -C 5卤代炔基,缩水甘油基,糠基 烷基硫代烷基,C 3 -C 6环烷基或阳离子R 1为C 1 -C 4烷基,R 2为C 1 -C 4烷基或C 3 -C 6环烷基,或R 1和R 2与相邻碳原子一起形成C 3 -C 6环烷基; 并且R 3是氢或C 1 -C 3烷基。 该化合物用作除草剂。

    FM Stereo demodulation circuit
    5.
    发明授权
    FM Stereo demodulation circuit 失效
    FM立体声解调电路

    公开(公告)号:US4489430A

    公开(公告)日:1984-12-18

    申请号:US408993

    申请日:1982-08-17

    CPC分类号: H04H40/72 H03D1/2227 H03D3/04

    摘要: A pulse position modulated (PPM) signal is derived from an input FM signal, and first and second switching signals are derived which are opposite in phase and correspond to alternating half cycles of the PPM signal. First and second opposite phase subcarrier signals are derived synchronized to the pilot signal in the input FM signal, and various combinations of the switching and subcarrier signals are multiplied together and the multiplication products combined to obtain left and right channel outputs.

    摘要翻译: 从输入FM信号导出脉冲位置调制(PPM)信号,导出与相位相反并对应于PPM信号的交替半周期的第一和第二切换信号。 导出与输入FM信号中的导频信号同步的第一和第二相反相位副载波信号,并将切换和副载波信号的各种组合相乘在一起,乘积合成以获得左右声道输出。

    Stereophonic signal demodulation circuit
    6.
    发明授权
    Stereophonic signal demodulation circuit 失效
    立体声信号解调电路

    公开(公告)号:US4280101A

    公开(公告)日:1981-07-21

    申请号:US54117

    申请日:1979-07-02

    CPC分类号: H04H40/45 H04B1/1646

    摘要: A stereophonic signal demodulation circuit receives an input signal including a signal modulated with first and second channel information to separate the first and second channel information from each other. The circuit includes first and second operational amplifiers and at least two switching devices namely, first and second switches for applying the input signal through respective resistors to one input terminal of the first operational amplifier and third and fourth switches for applying the input signal through respective resistors to one input terminal of the second operational amplifier. A control device controls the operations of the first through fourth switches and the first and second operational amplifiers outputs first and second channel information, respectively.

    摘要翻译: 立体声信号解调电路接收包括用第一和第二信道信息调制的信号的输入信号,以将第一和第二信道信息彼此分离。 该电路包括第一和第二运算放大器以及至少两个开关器件,即用于通过相应电阻器将输入信号施加到第一运算放大器的一个输入端的第一和第二开关,以及用于通过相应电阻器施加输入信号的第三和第四开关 连接到第二运算放大器的一个输入端。 控制装置控制第一至第四开关的操作,第一和第二运算放大器分别输出第一和第二通道信息。

    MPX Stereophonic demodulation
    7.
    发明授权
    MPX Stereophonic demodulation 失效
    MPX立体声解调

    公开(公告)号:US4274057A

    公开(公告)日:1981-06-16

    申请号:US54116

    申请日:1979-07-02

    CPC分类号: H04H40/45 H03D1/2227

    摘要: An MPX stereophonic demodulation switching circuit having first and second identical switching circuits adapted to transmit a composite input signal to respective output terminals. First and second switching elements are connected respectively between the junction points of resistors in first and second transmission paths in each switching circuit, and a reference voltage line. A voltage follower circuit is provided to produce a reference voltage. Groups of resistors are connected in parallel between the output terminal of the voltage follower and one respective output terminal. Third and fourth switching elements are connected respectively between the connection points of the resistors in each group of resistors and the reference voltage line in each switching circuit. Opposite pairs of switching elements in the two switching circuits are controlled to be alternately rendered conductive and non-conductive.

    摘要翻译: MPX立体声解调切换电路具有第一和第二相同的切换电路,其适于将复合输入信号发送到相应的输出端。 第一和第二开关元件分别连接在每个开关电路中的第一和第二传输路径中的电阻器的连接点和参考电压线之间。 提供电压跟随器电路以产生参考电压。 电阻组在电压跟随器的输出端子和一个相应的输出端子之间并联连接。 第三和第四开关元件分别连接在每组电阻器中的电阻器的连接点和每个开关电路中的参考电压线之间。 控制两个开关电路中相对的开关元件对交替地导通和不导通。

    Distortion-free, opposite-phase current source
    8.
    发明授权
    Distortion-free, opposite-phase current source 失效
    无失真,反相电流源

    公开(公告)号:US4853609A

    公开(公告)日:1989-08-01

    申请号:US502806

    申请日:1983-06-09

    CPC分类号: G05F3/22

    摘要: An opposite-phase current source is improved by eliminating the conventionally employed current mirror circuits, and by instead using a pair of transistor current sources subjected to voltage feedback and emitter-connected via a resistor. A constant current source or sources are coupled to the opposite ends of the resistor or to a mid-point thereof.

    摘要翻译: 通过消除常规使用的电流镜电路,并且通过经由电阻器经受电压反馈和发射极连接的一对晶体管电流源来改善反相电流源。 恒定电流源或源耦合到电阻器的相对端或其中点。

    Process for the production of tetrahydropyran-3-one derivatives
    9.
    发明授权
    Process for the production of tetrahydropyran-3-one derivatives 失效
    四氢吡喃-3-酮衍生物的制备方法

    公开(公告)号:US4837345A

    公开(公告)日:1989-06-06

    申请号:US140211

    申请日:1987-12-31

    CPC分类号: C07D309/30

    摘要: A process for producing a tetrahydropyran-3-one derivative of the formula: ##STR1## wherein R is a hydrogen atom; a straight chained or branched C.sub.1 -C.sub.10 alkyl group which is unsubstituted or substituted by a halogen atom, a hydroxyl group, a C.sub.1 -C.sub.6 alkoxy group, a C.sub.1 -C.sub.6 alkylthio group, a C.sub.1 -C.sub.6 alkylcarbonyloxy group, a C.sub.1 -C.sub.6 alkoxycarbonyl group, a C.sub.1 -C.sub.6 mono- or dialkylamino group, a C.sub.3 -C.sub.6 cycloaklyl group, a C.sub.1 -C.sub.6 alkylaminocarbonyl group, a C.sub.1 -C.sub.6 alkylcarbonylamino group, a C.sub.1 -C.sub.6 alkylcarbonyl group or a phenyl or benzoyl group which is unsubstituted or substituted by a halogen atom, a C.sub.1 -C.sub.6 alkyl group, a C.sub.1 -C.sub.6 alkoxy group, a C.sub.1 -C.sub.6 alkythio group or a C.sub.1 -C.sub.6 alkoxycarbonyl group; a C.sub.3 -C.sub.6 cycloalkyl group; or a phenyl or biphenyl group which is unsubstituted or substituted by a halogen atom, a C.sub.1 -C.sub.6 alkoxy group or C.sub.1 -C.sub.6 alkylthio group, which comprises reacting a 2H-pyran-3(6H)-one derivative of the formula: ##STR2## wherein R is as defined above, and R' is a straight chained or branched C.sub.1 -C.sub.6 acyl group which is unsubstituted or substituted by a halogen atom; a benzoyl group; a C.sub.1 -C.sub.6 alkoxycarbonyl group; or a mono- or dialkylaminocarbonyl group which is unsubstituted or substituted by a C.sub.1 -C.sub.3 alkyl group or a phenyl group, with hydrogen in the presence of a catalyst selected from the group consisting of cobalt, nickel, ruthenium, rhodium, palladium, iridium, platinum and copper chromite.

    摘要翻译: 一种制备下式的四氢吡喃-3-酮衍生物的方法:其中R是氢原子; 未被取代或被卤素原子,羟基,C1-C6烷氧基,C1-C6烷硫基,C1-C6烷基羰氧基,C1-C6烷氧基羰基取代的直链或支链C1-C10烷基 基团,C1-C6单 - 或二烷基氨基,C3-C6环烯基,C1-C6烷基氨基羰基,C1-C6烷基羰基氨基,C1-C6烷基羰基或未取代或取代的苯基或苯甲酰基 C 1 -C 6烷基,C 1 -C 6烷氧基,C 1 -C 6链炔基或C 1 -C 6烷氧基羰基; C3-C6环烷基; 或未被取代或被卤素原子,C1-C6烷氧基或C1-C6烷硫基取代的苯基或联苯基,其包括使下式的2H-吡喃-3(6H) - 酮衍生物: