ดาวน์โหลด

ข้อมูลสัญลักษณ์จำแนกการออกแบบผลิตภัณฑ์ระหว่างประเทศ

รหัส / code คำอธิบาย / code name Version
H03D0003180000 by means of synchronous gating arrangements 1
H03D0003200000 producing pulses whose amplitude or duration depends on the phase difference 1
H03D0003220000 by means of active elements with more than two electrodes to which two signals are applied derived from the signal to be demodulated and having a phase difference related to the frequency deviation, e.g. phase detector 1
H03D0003240000 Modifications of demodulators to reject or remove amplitude variations by means of locked-in oscillator circuits 1
H03D0003260000 by means of sloping amplitude/frequency characteristic of tuned or reactive circuit (H03D0003280000-H03D0003320000; take precedence);; 1
H03D0003280000 Modifications of demodulators to reduce effect of temperature variations 1
H03D0003300000 by means of transit-time tubes 1
H03D0003320000 by deflecting an electron beam in a discharge tube (H03D0003300000 takes precedence);; 1
H03D0003340000 by means of electromechanical devices (H03D0003160000 takes precedence);; 1
H03D0005000000 Circuits for demodulating amplitude-modulated or angle-modulated oscillations at will (H03D0009000000, H03D0011000000 take precedence;demodulators adapted for digitally modulated carrier systems characterised by combinations of amplitude and angle modulation, e.g. quadrature amplitude modulation H04L0027380000) 1
H03D0007000000 Transference of modulation from one carrier to another, e.g. frequency-changing (H03D0009000000, H03D0011000000 take precedence;dielectric amplifiers, magnetic amplifiers, parametric amplifiers used as frequency-changers H03F) 1
H03D0007020000 by means of diodes (H03D0007140000-H03D0007220000; take precedence);; 1
H03D0007040000 having negative resistance characteristic, e.g. tunnel diode 1
H03D0007060000 by means of discharge tubes having more than two electrodes (H03D0007140000-H03D0007220000; take precedence);; 1
H03D0007080000 the signals to be mixed being applied between the same two electrodes 1
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