Title:
TEMPERATURE STABILIZED OSCILLATOR AND PROXIMITY SWITCH CONTAINING OSCILLATOR
Document Type and Number:
Japanese Patent JP2008278506
Kind Code:
A
Abstract:
To afford a simple stabilization of the temperature behavior of an oscillator and to allow the low price manufacture of proximity switches, having a great switching distance, which function safely in a broad temperature range.
In an oscillator including a resonant circuit L, C, RCU and an amplifier circuit V, R1, R2, R3 connected as a virtual negative resistance, a direct current source I1 is connected in series with the resonant circuit L, C, RCU. In this way, a signal UCU is provided being a measure for the resistance of the oscillator circuit coil L. By using this signal UCU, a control circuit V1, M controls the virtual negative resistance inversely proportional to the resistance RCU of the oscillator circuit coil L.
Inventors:
HEIMLICHER PETER
Application Number:
JP2008127343A
Publication Date:
November 13, 2008
Filing Date:
May 14, 2008
Export Citation:
Assignee:
OPTOSYS AG
International Classes:
H03B5/04; H03B5/08; H03B5/12; H03B7/06; H03K17/14; H03K17/95; H03L1/02; H03B7/02
Domestic Patent References:
| JPH01212005A | 1989-08-25 | |||
| JPS5824205A | 1983-02-14 | |||
| JPS59117319A | 1984-07-06 | |||
| JPH01212005A | 1989-08-25 | |||
| JPS5824205A | 1983-02-14 | |||
| JPS59117319A | 1984-07-06 |
Attorney, Agent or Firm:
Hideto Asamura
Hajime Asamura
Hayashi Zouzo
Hajime Asamura
Hayashi Zouzo