公开(公告)号：US5160902A

公开(公告)日：1992-11-03

申请号：US727839

申请日：1991-07-09

Applicant: Hiroshi Saeki ,  Hatsuo Motoyama

Inventor： Hiroshi Saeki ,  Hatsuo Motoyama

IPC: H03B1/00 ,  H03B5/12 ,  H03B19/16 ,  H03B19/20 ,  H03B21/01 ,  H03L7/093 ,  H03L7/113

CPC classification number: H03B19/16 ,  H03B19/20 ,  H03B21/01 ,  H03B5/1203 ,  H03B5/1231 ,  H03B5/1243 ,  H03B5/1262 ,  H03B5/1293 ,  H03L7/093 ,  H03L7/113 ,  H03B2200/0034 ,  H03B2200/0042 ,  H03B2201/0208 ,  H03B2201/0216 ,  H03B2201/033

Abstract: A voltage controlled oscillator comprises a resonant circuit having at least a coil and a first variable capacitance diode, and resonating within predetermined variable frequency ranges; and an active circuit having an input, an output, and an active element connected between the input and the output, the input being connected to the resonant circuit in order to receive a resonant output therefrom. A variable capacitance ratio circuit, having a second variable capacitance diode and at least one capacitor, is connected in a positive feedback manner, between the input and the output of said active circuit means in order to oscillate the active element of the active circuit at a resonant frequency of the resonant circuit, between the input and the output of the active circuit. A variable controller is provided for changing a resonant frequency of the resonant circuit, to thereby apply a control voltage to the first and second variable capacitance diodes and to control a capacitance ratio between the at least one capacitor and the second variable capacitance diode in the variable capacitance ratio circuit, so that an oscillator frequency of the active element can be changed substantially linearly over a wide bandwidth of no less than one octachord in accordance with a variation in the control voltage, to thereby retain the amount of positive feedback at a predetermined level against the oscillator frequency of the active circuit.

Abstract translation: 压控振荡器包括具有至少线圈和第一可变电容二极管并在预定可变频率范围内谐振的谐振电路; 以及有源电路，其具有连接在输入和输出之间的输入，输出和有源元件，输入端连接到谐振电路，以便从其接收谐振输出。 具有第二可变电容二极管和至少一个电容器的可变电容比电路以正反馈的方式连接在所述有源电路装置的输入和输出之间，以便将有源电路的有源元件在 谐振电路的谐振频率，有源电路的输入和输出之间。 提供了一种可变控制器，用于改变谐振电路的谐振频率，从而对第一和第二可变电容二极管施加控制电压，并且控制变量中的至少一个电容器和第二可变电容二极管之间的电容比 电容比电路，使得有源元件的振荡器频率可以根据控制电压的变化在宽度不小于一个八角形的宽带宽上基本上线性地改变，从而将正反馈量保持在预定水平 针对有源电路的振荡器频率。

公开(公告)号：US5122763A

公开(公告)日：1992-06-16

申请号：US570048

申请日：1990-08-20

Applicant: Hiroshi Saeki ,  Hatsuo Motoyama

Inventor： Hiroshi Saeki ,  Hatsuo Motoyama

IPC: H03B1/00 ,  H03B5/12 ,  H03B19/16 ,  H03B19/20 ,  H03B21/01 ,  H03L7/093 ,  H03L7/113

CPC classification number: H03B19/16 ,  H03B19/20 ,  H03B21/01 ,  H03B5/1203 ,  H03B5/1231 ,  H03B5/1243 ,  H03B5/1262 ,  H03B5/1293 ,  H03L7/093 ,  H03L7/113 ,  H03B2200/0034 ,  H03B2200/0042 ,  H03B2201/0208 ,  H03B2201/0216 ,  H03B2201/033

Abstract: A frequency synthesizer includes a control section; a first signal generator responsive to the control section for selectively outputting one of frequency signals whose frequencies are represented by Fp=a.times..vertline.P.vertline..times..DELTA.F (where the coefficient a is a positive odd number and the coefficient p is an integer); and a second signal generator responsive to the control section for selectively outputting one of frequencies whose frequencies are represented by Fq=b.times..vertline.Q.vertline..times..DELTA.F (where the coefficient b is a positive integer exclusive of integral multiples of prime factors into which a is resolved, and the coefficient Q is an integer and satisfying the expression: .vertline.Q.vertline..ltoreq.(a-1)/2. A mixer mixes a frequency signal Fp from the first signal generator and a frequency signal Fq from the second signal generator; and a frequency selecting circuit selects either of frequency signals .vertline.FP-Fq.vertline. or Fp+Fq output from the mixer. The control section determines the values of P and Q satisfying the following expresion P=T+(S-b.times.Q)/a on the basis of a desired frequency signal Fi=m.times..DELTA.F, a coefficient m=0, 1, 2, ..n set in predetermined frequency .DELTA.F; and quotient T and remainder s of m/a to cause each of the first and second signal generators to output a predetermined frequency and the frequency selecting circuit to select one of the frequency signals .vertline.Fp-Fq.vertline. and Fp+Fq that corresponds to the frequency signal Fi.

公开(公告)号：US4891610A

公开(公告)日：1990-01-02

申请号：US311699

申请日：1989-02-16

Applicant: Peter E. Veith

Inventor： Peter E. Veith

IPC: H01P7/00 ,  H03B1/00 ,  H03B5/18

CPC classification number: H03B5/1805 ,  H03B2201/0208 ,  H03B2201/033 ,  H03B5/1823

Abstract: A UHF-feedback oscillator for a frequency range of at least 300 MHz to 1000 MHz includes an amplifier stage, a voltage controlled tuning filter and a feedback quadripole. The feedback quadripole comprises a two- or three- loop helical waveguide resonator. Thus, the oscillator is easily adjustable to its oscillating condition within the very wideband frequency range of between 300 MHz and 1000 MHz and can be miniaturized in the simplest manner.

Abstract translation: 用于至少300MHz至1000MHz的频率范围的UHF反馈振荡器包括放大器级，电压调节滤波器和反馈四极。 反馈四极管包括一个二或三环螺旋波导谐振器。 因此，振荡器可以在300MHz至1000MHz之间的非常宽的频带范围内容易地调整为其振荡状态，并且可以以最简单的方式进行小型化。