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61. 发明专利

DE1250887B 未知
公开(公告)号：DE1250887B
公开(公告)日：1967-09-28
申请号：DEN0022669
申请日：1963-01-29
IPC分类号： H03B5/12 , H03C3/14 , H03C3/20 , H03B5/08

62. 发明专利

GB1049613A Electric circuit with non-linear dielectric element 未知
公开(公告)号：GB1049613A
公开(公告)日：1966-11-30
申请号：GB4320963
申请日：1963-11-01
申请人： CESKOSLOVENSKA AKADEMIE VED
IPC分类号： G05D23/20 , H03C3/20 , H03F11/00 , H03L1/02
摘要： 1,049,613. Temperature sensitive dielectrics. CESKOSLOVENSKA AKADEMIE VED. Nov. 1, 1963 [Nov. 3, 1962; Dec. 18, 1962; March 15, 1963], No. 43209/63. Heading H1K. [Also in Division H3] A non-linear capacitance circuit comprises a capacitor having a dielectric, e.g. triglycine sulphate, the imaginary component of the dielectric constant of which decreases with rising temperature over a certain range and a source of alternating current the frequency and voltage of which may be varied together or independently to bring the dielectric temperature by dielectric heating to a point just above the Curie temperature at which the rate of change with voltage of the real component of dielectric constant is a maximum. It is shown in the Specification that this operating condition is autostable, the dielectric temperature being substantially independent of changes in ambient temperature, power supplied and rate of heat loss. The arrangement can thus be used to maintain an enclosure at a predetermined stabilized temperature. Since the operating point also substantially coincides with the maximum rate of change of dielectric constant with applied voltage the dielectric can be thus operated as part of a high-frequency dielectric amplifier, modulator or frequency mixer or multiplier circuit as described in Division H3 to give enhanced results.

63. 发明专利

NL6402326A 未知
公开(公告)号：NL6402326A
公开(公告)日：1964-09-08
申请号：NL6402326
申请日：1964-03-06
IPC分类号： G05D23/20 , H03C3/20 , H03F11/00 , H03L1/02
摘要： 1,053,114. Dielectric amplifiers; frequency modulation. CESKOSLOVENSKA AKADEMIE VED. March 4, 1964 [March 7, 1963; March 15, 1963 (2)], No. 9128/64. Headings H3B and H3R. [Also in Division H1] In dielectric amplifiers and frequency modulated oscillators temperature stabilization is effected by mounting the dielectric in thermal contact with another dielectric body maintained in an autostabilized mode by dielectric heating as described in Specification 1,049,613. In the oscillator shown in Fig. 3 the temperature of body 1, forming part of the resonant circuit, is maintained by the dielectric heating of body 2 at the temperature at which the dielectric constant of body 1 varies most with applied voltage. Modulation is effected by a signal applied at 9. In the amplifier of Fig. 4 the bodies 11, 12 form a tuned circuit with inductor 7. Again they are maintained at a temperature at which voltage dependent variation of dielectric constant is a maximum by autostabilized dielectric heating of bodies 21, 13. Impedance of the resonant circuit is modulated by signals from source 9 and the output across the circuit is demodulated at 100 and fed to an RC circuit as shown.

64. 发明专利

FR1346132A 未知
公开(公告)号：FR1346132A
公开(公告)日：1963-12-13
申请号：FR923275
申请日：1963-01-31
申请人： PHILIPS NV
IPC分类号： H03B5/12 , H03C3/14 , H03C3/20

65. 发明专利

FR1099515A 未知
公开(公告)号：FR1099515A
公开(公告)日：1955-09-06
申请号：FR1099515D
申请日：1954-01-26
IPC分类号： H03C3/20

66. 发明专利

FR1004214A 未知
公开(公告)号：FR1004214A
公开(公告)日：1952-03-27
申请号：FR1004214D
申请日：1947-03-20
申请人： CFCMUG
IPC分类号： H03C3/20

67. 发明专利

FR963755A 未知
公开(公告)号：FR963755A
公开(公告)日：1950-07-20
申请号：FR963755D
IPC分类号： H03C3/12 , H03C3/14 , H03C3/20
摘要： 653,009. Phase modulation. AUTOPHON AKT.-GES. March 19, 1948, No. 8299. Convention date, April 3, 1947. [Class 40 (v)] A phase modulator comprises three coupled oscillatory circuits K1, K2, K3 to the first K1 of which an input voltage of constant frequency and amplitude is fed, the second circuit K2 coupled to the first comprising a variable reactance controlled by a modulating voltage and the third circuit K3 also coupled with the first, producing a voltage Vf of constant frequency, amplitude and phase in opposition to the mean value of the phase in the second circuit, and half the amplitude at the mean phase so that across the opposed outputs Vv, Vf of the second and third circuits a phase modulated voltage Va free from amplitude modulation is derived, and with the second circuit phase modulation approximately doubled. When output Va is considerably loaded detuning may be avoided by connecting the circuit K2 to a centre tap of the coil of the circuit K3 and connecting a compensating impedance between the free end of circuit K3 and circuit K2. If impedance instead of inductive couplings are used and the mean phase of the amplitude Vvo (Fig. 7), in circuit K2 makes an angle #0 other than 90 degrees with the input voltage Ve of circuit K1, the opposing voltage Vf again equals one half of Vvo and bears a phase relation to Ve opposite to that of Vv0. The three coils may be mounted on a cylinder with the coil of circuit K adjustable between fixed coils of circuits K2, K3.

68. 发明专利

GB627113A Improvements in variable condensers 未知
公开(公告)号：GB627113A
公开(公告)日：1949-07-28
申请号：GB1045147
申请日：1947-04-18
申请人： RCA CORP
IPC分类号： H03C3/20
摘要： A ceramic composition for a condenser dielectric is prepared by compressing fine particle titanate powders, e.g. 71 per cent barium titanate and 29 per cent strontium titanate, and adding a binder. The powder is pressed in a die and fired in an electric furnace at 1,300 DEG C. to 1,400 DEG C.

69. 发明专利

CH237891A Generator zur Erzeugung elektrischer Schwingungen veränderbarer Frequenz. 未知
公开(公告)号：CH237891A
公开(公告)日：1945-05-31
申请号：CH237891D
申请日：1943-09-20
申请人： PATELHOLD PATENTVERWERTUNG
发明人： PATENTVERWERTUNGS-ELEKTRO-HOLD
IPC分类号： H03C3/20 , H03C3/24

70. 发明专利

GB561323A Arrangements for the frequency modulation of a high-frequency oscillation 未知
公开(公告)号：GB561323A
公开(公告)日：1944-05-15
申请号：GB1401642
申请日：1942-10-06
申请人： PATELHOLD PATENTVERWERTUNG
IPC分类号： H03C3/20
摘要： 561,323. Automatic control systems. PATELHOLD PATENTVERWERTUNGS- & ELEKTROHOLDING AKT.-GES. Oct. 6, 1942, No. 14016. Convention date, Oct. 28, 1941. [Class 38 (iv)] [Also in Group XL]. An arrangement for the frequency modulation of a high-frequency oscillation, consists of at least one oscillatory circuit, which comprises at least one condenser with mechanically non- displaceable coatings and a mechanically non-displaceable blocking layer, the capacity of which is dependent upon a bias voltage and to which a lowfrequency control voltage is supplied, so that the tuning varies in accordance with this lowfrequency voltage. Fig. 1 shows a valve V arranged as a back-coupled oscillator, the frequency of which is determined by an inductance L and adjustable condenser C shunted by a potential variable condenser K of the blocking layer type. The output, taken at 3, 4 is at a frequency which is variable in accordance with fluctuations in a voltage e which is applied at 1, 2 through a high-frequency choke L0 to vary the capacity of condenser K. The invention is also applicable to oscillators in which the tuned circuit has Bee point connection to the electrodes of the valve, Fig. 2 (not shown), while in a further embodiment, the fluctuating control potential is applied directly across the potential variable capacity, Fig. 3 (not shown). Fig. 5 shows the invention applied to a frequency modulation transmitter comprising a generator G, the output of which is modulated by a microphone M by means of an amplifier A1 applying a voltage to a potential variable condenser forming part of the frequency determining circuit Q of the generator. The output from G is passed through a frequenoy doubler F and amplifier A2 to the aerial. In order to keep the mean frequency constant, the output from F is heterodyned at M1 to give a difference frequency which is fed to a discriminator circuit D which produces a voltage which varies in magnitude and sign according to deviations of the difference frequency from its assigned value. This voltage is fed to the potential variable condenser at Q to maintain the frequency constant.

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