FIELD: agriculture. SUBSTANCE: rodent scare-away device comprises setting generator 1, binary counter 2, oscillating frequency generator 3, switch circuit 4, frequency divider 5, saw-tooth voltage generator 6, voltage-controlled generator 7, power amplifier 8, loudspeaker 9. The device generates a signal unbearable to rodents. EFFECT: higher efficiency. 2 cl, 2 dwg
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 | RU2146445C1 | 
| RODENT REPELLING APPARATUS | 1995 | 
 | RU2099944C1 | 
| DISPLACEMENT-TO-CODE CONVERTER | 0 | 
 | SU1367158A1 | 
| SHAFT ANGLE DIGITIZER | 0 | 
 | SU1508344A1 | 
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| DEVICE FOR SIMULATING PULSE-OPERATED RANGEFINDER INCORPORATING PROVISION FOR AUTOMATIC RANGE TRACKING TO DIELECTRIC LAYER | 1992 | 
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| ULTRASONIC DIAGNOSTIC APPARATUS | 2002 | 
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| SHF TRANSMITTER | 2002 | 
 | RU2208909C2 | 
| VARIABLE-SPEED ELECTRIC DRIVE WITH UNCONTROLLABLE DC SECTION | 1993 | 
 | RU2067352C1 | 
Authors
Dates
1995-08-27—Published
1992-12-21—Filed