DE3710835A1 - LC oscillator - Google Patents

LC oscillator

Info

Publication number
DE3710835A1
DE3710835A1 DE19873710835 DE3710835A DE3710835A1 DE 3710835 A1 DE3710835 A1 DE 3710835A1 DE 19873710835 DE19873710835 DE 19873710835 DE 3710835 A DE3710835 A DE 3710835A DE 3710835 A1 DE3710835 A1 DE 3710835A1
Authority
DE
Germany
Prior art keywords
circuit
oscillator
inverter
inductance
oscillator according
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
DE19873710835
Other languages
German (de)
Inventor
Dietmar Dr Kohn
Hans-Rolf Prof Dr Traenkler
Jakob Dr Schillinger
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to DE19873710835 priority Critical patent/DE3710835A1/en
Publication of DE3710835A1 publication Critical patent/DE3710835A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R27/00—Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom
    • G01R27/02—Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived therefrom, e.g. time constant
    • G01R27/26—Measuring inductance or capacitance; Measuring quality factor, e.g. by using the resonance method; Measuring loss factor; Measuring dielectric constants ; Measuring impedance or related variables
    • G01R27/2611—Measuring inductance
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03B—GENERATION OF OSCILLATIONS, DIRECTLY OR BY FREQUENCY-CHANGING, BY CIRCUITS EMPLOYING ACTIVE ELEMENTS WHICH OPERATE IN A NON-SWITCHING MANNER; GENERATION OF NOISE BY SUCH CIRCUITS
    • H03B5/00—Generation of oscillations using amplifier with regenerative feedback from output to input
    • H03B5/08—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element comprising lumped inductance and capacitance
    • H03B5/12—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element comprising lumped inductance and capacitance active element in amplifier being semiconductor device
    • H03B5/1206—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element comprising lumped inductance and capacitance active element in amplifier being semiconductor device using multiple transistors for amplification
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03B—GENERATION OF OSCILLATIONS, DIRECTLY OR BY FREQUENCY-CHANGING, BY CIRCUITS EMPLOYING ACTIVE ELEMENTS WHICH OPERATE IN A NON-SWITCHING MANNER; GENERATION OF NOISE BY SUCH CIRCUITS
    • H03B5/00—Generation of oscillations using amplifier with regenerative feedback from output to input
    • H03B5/08—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element comprising lumped inductance and capacitance
    • H03B5/12—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element comprising lumped inductance and capacitance active element in amplifier being semiconductor device
    • H03B5/1228—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element comprising lumped inductance and capacitance active element in amplifier being semiconductor device the amplifier comprising one or more field effect transistors
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03B—GENERATION OF OSCILLATIONS, DIRECTLY OR BY FREQUENCY-CHANGING, BY CIRCUITS EMPLOYING ACTIVE ELEMENTS WHICH OPERATE IN A NON-SWITCHING MANNER; GENERATION OF NOISE BY SUCH CIRCUITS
    • H03B5/00—Generation of oscillations using amplifier with regenerative feedback from output to input
    • H03B5/02—Details
    • H03B5/04—Modifications of generator to compensate for variations in physical values, e.g. power supply, load, temperature

Abstract

An LC oscillator having a modified pi circuit and a cascode invertor is described. The LC oscillator according to the invention is characterised by the combination of the following features: The invertor is formed from a "dual complementary pair plus invertor". In the series section of the pi circuit, at least one capacitor is connected in series with the inductance of the resonant LC circuit. A resistance network is connected to the shunt capacitors of the pi circuit.

Description

Die Erfindung bezieht sich auf einen LC-Oszillator gemäß dem Oberbegriff des Patentanspruchs 1.The invention relates to an LC oscillator according to the preamble of claim 1.

Der Erfindung liegt die Aufgabe zugrunde, einen kostengün­ stigen LC-Oszillator anzugeben, der sich unter anderem zur Messung der Induktivität von Schraubenfedern gemäß Patent P 32 05 705 eignet.The invention has for its object a cost-effective to specify LC oscillator, which among other things for Measurement of the inductance of coil springs according to patent P 32 05 705 is suitable.

Eine erfindungsgemäße Lösung dieser Aufgabe ist mit ihren Weiterbildungen in den Patentansprüchen gekennzeichnet.An inventive solution to this problem is with their Developments characterized in the claims.

Die Erfindung wird im folgenden anhand eines Ausführungs­ beispiels unter Bezugnahme auf die Zeichnung näher be­ schrieben, in der zeigtThe invention is based on an embodiment example with reference to the drawing be wrote in the shows

Fig. 1 die Schaltung eines erfindungsgemäßen Oszillators, und Fig. 1 shows the circuit of an oscillator according to the invention, and

Fig. 2 eine Weiterbildung. Fig. 2 is a training.

Der in Fig. 1 gezeigte LC-Oszillator weist einen Kaskoden- Inverter, der von MOS-FETs MF 1 . . . 4 gebildet wird, und eine Π-Schaltung auf, die von Kondensatoren C 1 bis C 4 und einer Induktivität L 1, beispielsweise einer Schraubenfeder gemäß Patent P 32 05 705 gebildet wird.The LC oscillator shown in FIG. 1 has a cascode inverter which is composed of MOS-FETs MF 1. . . 4 is formed, and a Π circuit, which is formed by capacitors C 1 to C 4 and an inductor L 1 , for example a coil spring according to patent P 32 05 705.

Der Kaskoden-Inverter erzeugt eine Phasendrehung zwischen Eingangsanschluß und Ausgangsanschluß von 180°. Von beson­ derem Vorteil ist die weitgehend Einflußgrößen-unabhängige Eingangs- und Ausgangsimpedanz. Die für diese Schaltung benötigten vier MOS-FETs sind in einem Baustein 4007 ent­ halten. Die Beschaltung der Anschlußpins dieses Bausteins ist in Fig. 1 eingetragen (Bezugszeichen 1 folgende). Die im Baustein vorhandenen, aber nicht benötigten MOS-FETs können auf festes Bezugspotential gelegt sein, um Lei­ tungsvorgänge zu unterbinden, oder zur weiteren Signalaus­ wertung herangezogen werden.The cascode inverter produces a phase shift between the input connection and the output connection of 180 °. Of particular advantage is the largely independent of the input and output impedance. The four MOS-FETs required for this circuit are contained in a module 4007. The wiring of the connection pins of this module is entered in Fig. 1 (reference number 1 below). The MOS-FETs present in the module, but not required, can be set to a fixed reference potential in order to prevent line processes, or can be used for further signal evaluation.

Die zur Erzielung der Schwingungsbedingung erforderliche weitere Phasendrehung um 180° wird durch das Π-Netzwerk erreicht. Frequenzbestimmend sind hierbei die querliegende Serieninduktivität L 1 und die beiden Parallelkondensatoren C 1 und C 4. Die in Serie geschalteten Kondensatoren C 2 und C 3 dienen als Sperrfilter für die Gleichspannung und als Schutz der Kaskodenschaltung vor Spannung an den Eingangs­ klemmen E 1 und E 2.The Ph network achieves the additional phase rotation required by 180 ° to achieve the oscillation condition. The transverse series inductance L 1 and the two parallel capacitors C 1 and C 4 determine the frequency here. The series-connected capacitors C 2 and C 3 serve as blocking filters for the DC voltage and to protect the cascode circuit against voltage at the input terminals E 1 and E 2 .

Der Widerstand R 3 erzwingt das Anschwingen des Oszilla­ tors. Die Widerstände R 1, R 2, R 4 und R 5 dienen sowohl zur Erzeugung einer Vorspannung für den Inverter als auch zur ohmschen Belastung der Π-Schaltung.The resistor R 3 forces the oscillation of the oscillator gate. The resistors R 1 , R 2 , R 4 and R 5 serve both to generate a bias for the inverter and to resistively load the Π circuit.

Der kleine Temperaturgradient der Schaltung (10 Hz/K) und die relativ hohe Empfindlichkeit bezüglich der Versor­ gungsspannung (1 kHz/V) eröffnen die Möglichkeit, durch eine temperaturgesteuerte Spannungsversorgung einen in bestimmten Bereichen temperaturunabhängigen LC-Oszillator zu erhalten. Dies kann beispielsweise mit einer Schaltung gemäß Fig. 2 erreicht werden, bei der die Temperaturstabi­ lisierung durch einen Parallelregler (TL 31) erhalten wird. R 1 dient als Vorwiderstand, R 2 und/oder R 3 sind temperaturabhängige Widerstände.The small temperature gradient of the circuit (10 Hz / K) and the relatively high sensitivity with regard to the supply voltage (1 kHz / V) open up the possibility of obtaining an LC oscillator that is temperature-independent in certain areas through a temperature-controlled voltage supply. This can be achieved, for example, with a circuit according to FIG. 2, in which the temperature stabilization is obtained by a parallel controller (TL 31 ). R 1 serves as a series resistor, R 2 and / or R 3 are temperature-dependent resistors.

Claims (4)

1. LC-Oszillator mit einer modifizierten Π-Schaltung und einem Kaskoden-Inverter, gekennzeichnet durch die Kombination folgender Merkmale:
  • - der Inverter ist aus einem "Dual Complementary Pair Plus Inverter" gebildet,
  • - im "Längsteil" der Π-Schaltung ist wenigstens ein Kon­ densator (C 2, C 3) in Serie zu der Induktivität (L 1) des LC-Schwingkreises,
  • - die "Parallelkondensatoren" der Π-Schaltung sind mit einem Widerstandsnetzwerk (R 1-R 5) beschaltet.
1. LC oscillator with a modified Π circuit and a cascode inverter, characterized by the combination of the following features:
  • the inverter is formed from a "dual complementary pair plus inverter",
  • - In the "longitudinal part" of the Π circuit is at least one capacitor (C 2 , C 3 ) in series with the inductance (L 1 ) of the LC resonant circuit,
  • - The "parallel capacitors" of the Π circuit are connected to a resistor network (R 1 - R 5 ).
2. LC-Oszillator nach Anspruch 1, dadurch gekennzeichnet, daß der "Dual Complementary Pair Plus Inverter"-Baustein ein Baustein vom Typ 4007 ist.2. LC oscillator according to claim 1, characterized in that the "Dual Complementary Pair Plus Inverter "block is a type 4007 block. 3. LC-Oszillator nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß die angelegte Versorgungsspan­ nung temperaturabhängig ist.3. LC oscillator according to claim 1 or 2, characterized in that the supply chip is temperature-dependent. 4. Verwendung eines LC-Oszillators nach einem der An­ sprüche 1 bis 3, zur Messung der Induktivität einer ver­ formbaren Feder nach Patent 32 05 705.4. Use of an LC oscillator according to one of the An claims 1 to 3, for measuring the inductance of a ver malleable spring according to patent 32 05 705.
DE19873710835 1987-04-01 1987-04-01 LC oscillator Withdrawn DE3710835A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19873710835 DE3710835A1 (en) 1987-04-01 1987-04-01 LC oscillator

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19873710835 DE3710835A1 (en) 1987-04-01 1987-04-01 LC oscillator

Publications (1)

Publication Number Publication Date
DE3710835A1 true DE3710835A1 (en) 1988-10-20

Family

ID=6324551

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19873710835 Withdrawn DE3710835A1 (en) 1987-04-01 1987-04-01 LC oscillator

Country Status (1)

Country Link
DE (1) DE3710835A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0657993A1 (en) * 1993-12-13 1995-06-14 AT&T Corp. Low-power-dissipation cmos oscillator circuits
GB2446059A (en) * 2007-01-25 2008-07-30 Jonathan Michael Schaffer Measuring load on a spring

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0657993A1 (en) * 1993-12-13 1995-06-14 AT&T Corp. Low-power-dissipation cmos oscillator circuits
GB2446059A (en) * 2007-01-25 2008-07-30 Jonathan Michael Schaffer Measuring load on a spring

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Legal Events

Date Code Title Description
8141 Disposal/no request for examination