(0)H03B:0/1:
IPC6
SECTION H - ELECTRICITY
H03B
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H 03

 BASIC ELECTRONIC CIRCUITRY

H 03 B

 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 (measuring, testing G 01 R; generators adapted for electrophonic musical instruments G 10 H; speech synthesis G 10 L; masers, lasers H 01 S; dynamo-electric machines H 02 K; power inverter circuits H 02 M; by using pulse techniques H 03 K; automatic control of generators H 03 L; starting, synchronisation or stabilisation of generators where the type of generator is irrelevant or unspecified H 03 L; generation of oscillations in plasma H 05 H)

 

 

 
 

 1
/ 00 Details

1
/ 02 • Structural details of power oscillators, e.g. for heating  

1
/ 04 • Reducing undesired oscillations, e.g. harmonics  
 

 5
/ 00 Generation of oscillations using amplifier with regenerative feedback from output to input (H 03 B 9/00 , H 03 B 15/00 take precedence)

5
/ 02 • Details  

5
/ 04 • • Modifications of generator to compensate for variations in physical values, e.g. power supply, load, temperature  

5
/ 06 • • Modifications of generator to ensure starting of oscillations  

5
/ 08 • with frequency-determining element comprising lumped inductance and capacitance  

5
/ 10 • • active element in amplifier being vacuum tube (H 03 B 5/14 takes precedence)  

5
/ 12 • • active element in amplifier being semiconductor device (H 03 B 5/14 takes precedence)  

5
/ 14 • • frequency-determining element connected via bridge circuit to closed ring around which signal is transmitted  

5
/ 16 • • • active element in amplifier being vacuum tube  

5
/ 18 • with frequency-determining element comprising distributed inductance and capacitance  

5
/ 20 • with frequency-determining element comprising resistance and either capacitance or inductance, e.g. phase-shift oscillator  

5
/ 22 • • active element in amplifier being vacuum tube (H 03 B 5/26 takes precedence)  

5
/ 24 • • active element in amplifier being semiconductor device (H 03 B 5/26 takes precedence)  

5
/ 26 • • frequency-determining element being part of bridge circuit in closed ring around which signal is transmitted; frequency-determining element being connected via a bridge circuit to such a closed ring, e.g. Wien-Bridge oscillator, parallel-T oscillator  

5
/ 28 • • • active element in amplifier being vacuum tube  

5
/ 30 • with frequency-determining element being electromechanical resonator  

5
/ 32 • • being a piezo-electric resonator (piezo-electric elements in general H 01 L 41/00)  

5
/ 34 • • • active element in amplifier being vacuum tube (H 03 B 5/38 takes precedence)  

5
/ 36 • • • active element in amplifier being semiconductor device (H 03 B 5/38 takes precedence)  

5
/ 38 • • • frequency-determining element being connected via bridge circuit to closed ring around which signal is transmitted  

5
/ 40 • • being a magnetostrictive resonator (H 03 B 5/42 takes precedence; magnetostrictive elements in general H 01 L 41/00)  

5
/ 42 • • frequency-determining element connected via bridge circuit to closed ring around which signal is transmitted  
 

 7
/ 00 Generation of oscillations using active element having a negative resistance between two of its electrodes (H 03 B 9/00 takes precedence)

7
/ 02 • with frequency-determining element comprising lumped inductance and capacitance  

7
/ 04 • • active element being vacuum tube  

7
/ 06 • • active element being semiconductor device  

7
/ 08 • • • being a tunnel diode  

7
/ 10 • • active element being gas-discharge or arc-discharge tube  

7
/ 12 • with frequency-determining element comprising distributed inductance and capacitance  

7
/ 14 • • active element being semiconductor device  
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