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公开(公告)号：SE367104B
公开(公告)日：1974-05-13
申请号：SE357971
申请日：1971-03-19
Applicant: RCA CORP
Inventor： CARLSON D
Abstract: An ultra high frequency (UHF) tuner includes tunable transmission lines having two conductive sections disposed on one face of a dielectric plate opposite a conductive ground plane disposed on the other dielectric plate face. The transmission lines are tuned by variable capacitance devices coupled between the conductive section of each line. To minimize interaction between the two transmission lines, the conductive sections of the lines are disposed on opposite surfaces of the dielectric plate with like ends of the lines adjacent opposite edges of the plate.
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公开(公告)号：BR6457999D0
公开(公告)日：1973-06-14
申请号：BR15799964
申请日：1964-03-31
Applicant: RCA CORP
Inventor： CARLSON D , THERIAULT G
IPC: D06B23/10 , H01L27/088 , H01L29/00 , H03B5/24 , H03D7/12 , H03F1/26 , H03F3/191 , H03F3/193 , H03G1/00 , H03G3/30
Abstract: 1,060,242. Field-effect transistor amplifier circuits. RADIO CORPORATION OF AMERICA. March 20, 1964 [April 1, 1963], No. 11953/64. Heading H3T. [Also in Division H1] Two insulated-gate field-effect transistors (see Division H1) 90, 92 are connected in a cascade amplifier circuit as shown, with their semi-conductor substrates 126, 132 earthed. A circuit using a single such transistor also is given, Fig. 5 (not shown).
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Patent Agency Ranking
公开(公告)号：SE317106B
公开(公告)日：1969-11-10
申请号：SE1464
申请日：1964-01-02
Applicant: RCA CORP
Inventor： CARLSON D , THERIAULT G
IPC: G11C16/04 , H01L21/00 , H01L27/00 , H01L29/00 , H03D1/18 , H03D3/14 , H03D13/00 , H03F3/193 , H03G3/20 , H03G11/00 , H03G11/06 , H03F3/16
Abstract: 1,066,634. Circuits using field-effect transistors. RADIO CORPORATION OF AMERICA. Dec. 20, 1963 [Jan. 2, 1963], No. 50468/63. Headings H3A and H3T. In a signal-translating circuit comprising an insulated-gate field-effect transistor with a substrate connection, a signal is derived at the substrate from the input signal or signals applied to the transistor and serves either as the output of the circuit or itself effects a further control within the circuit. In a first embodiment. Fig. 6, the input applied to the insulated gate electrode is coupled capacitively to the substrate and thereafter is rectified at the junction between the substrate and source electrode and, in the case where the voltage V 2 applied to the drain electrode is of zero value, also at the junction between substrate and drain. The output appearing at the substrate terminal may be employed either as detected modulation for subsequent amplification or for automatic gain control. The circuit may serve as an I.F. amplifier in which ease the resistor 122 is replaced by a tuned circuit. The output amplitude varies with D.C. bias applied to the gate electrode, Fig. 9 (not shown), and also with frequency, Fig. 8 (not shown), so that the current may serve as a frequency discriminator. Fig. 10 shows a " constant-angle " limiter or clipping circuit producing an output whose mark-space ratio is substantially independent of input amplitude. The input waveform to be clipped is applied from source 144 in series with the sourcedrain path of the transistor. The gate electrode is biased by battery 149 so that the device does not conduct when a positive voltage is applied to the drain electrode. However, in alternate half-cycles of the waveform from source 144 a negative voltage is applied to the device which then functions as a reversely connected fieldeffect transistor so that a square-wave output is produced across load 146. At the same time, however, rectification takes place at the junction 140 so producing a negative voltage at the substrate which is coupled through battery 149 and resistor 148 to the gate electrode. The bias on the gate electrode thus varies in accordance with the amplitude of the signal applied from source 144 in such a fashion as to maintain the conduction phase angle of the transistor substantially constant. Fig. 11 shows a phase detector circuit, e.g. for use as the chroma demodulator circuit in a receiver for the N.T.S.C. colour television system, in which the output depends solely on the phase angle between two oscillations of the same frequency, e.g. the output of chroma band-pass amplifier 74 and colour subcarrier local osillator 78. The signals from circuits 74 and 78 are applied to the gate and source electrodes respectively and an output dependent upon the phase difference between these signals is developed across the output resistor 88. A voltage dependent upon input signal amplitude is applied from the substrate as bias to the grid electrode to render the output substantially independent of input signal amplitude.
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公开(公告)号：DE1437435B2
公开(公告)日：1978-07-06
申请号：DER0037592
申请日：1964-04-01
Applicant: RCA CORP
Inventor： CARLSON D , THERIAULT G
IPC: D06B23/10 , H01L27/088 , H01L29/00 , H03B5/24 , H03D7/12 , H03F1/26 , H03F3/191 , H03F3/193 , H03G1/00 , H03G3/30 , H03F3/16
Abstract: 1,060,242. Field-effect transistor amplifier circuits. RADIO CORPORATION OF AMERICA. March 20, 1964 [April 1, 1963], No. 11953/64. Heading H3T. [Also in Division H1] Two insulated-gate field-effect transistors (see Division H1) 90, 92 are connected in a cascade amplifier circuit as shown, with their semi-conductor substrates 126, 132 earthed. A circuit using a single such transistor also is given, Fig. 5 (not shown).
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公开(公告)号：BR7402325D0
公开(公告)日：1974-11-19
申请号：BR232574
申请日：1974-03-25
Applicant: RCA CORP
Inventor： CARLSON D , HILLIKER S
Abstract: A video disc player, employing a stylus electrode to form a variable capacitance with a conductive disc coating, as geometry variations in the disc groove pass beneath the stylus, has a conductive stylus support arm which forms a transmission line with a surrounding arm housing of conductive material. The transmission line is capacity end loaded at the arm end remote from the stylus by a series combination of capacitances which include an air dielectric capacitor and a voltage variable capacitor. The air dielectric capacitor has a first set of plates suspended from the movable stylus support arm, and a second set of plates fixedly mounted on the housing and interleaved with the first set. The transmission line and associated capacitances form a tuned circuit with a resonant frequency subject to variation as the stylus-disc capacitance varies. The tuned circuit is excited with UHF oscillations from a fixed frequency oscillator operating at a frequency within an ISM-allocated band. As the resonant frequency of the tuned circuit varies, the resultant UHF oscillation amplitude variations are detected to recover the recorded information. A tuning control circuit responsive to the detector output adjusts the voltage variable capacitance to maintain a desired spacing between the oscillator output and the tuning range of the transmission line resonant circuit. The stylus support arm is subject to replacement in the housing without wiring disconnection or connection.
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公开(公告)号：BR6461686D0
公开(公告)日：1973-09-18
申请号：BR16168664
申请日：1964-08-11
Applicant: RCA CORP
Inventor： CARLSON D
Abstract: 1,076,924. Field effect transistor circuits; F.M. receivers; automatic frequency control. RADIO CORPORATION OF AMERICA. Aug. 5, 1964 [Aug. 23, 1963], No. 31880/64. Headings H3A, H3R and H3T. An insulated gate, field effect transistor has a variable voltage applied to a substrate electrode to vary the source input and drain output capacitances, and therefore the tuning of input and output circuits having inductors shunting the capacitances. Alternatively, an inductor may connect the drain and source electrodes of amplifiers having two such transistors in cascade, and resonate with the drain output and source input capacitances at the operating frequency variable tuning bias being then applied to both gate electrodes. In Fig. 7, the drain output circuit and gate circuit 150 are coupled so that oscillations are generated and the circuit is a converter, output circuit 142, 152 being tuned to the I.F. and inductor 148 resonating with the drain output capacitance 160 at the incoming frequency. Substrate voltage -V, reverse biasing the source and drain semi-conductor junction capacitance, may vary conjointly the tuning of the input circuit and local oscillator frequency so that the oscillator tracks the incoming frequency, although the input and output capacitances are unequally varied. Alternatively, a frequency discriminator may detect the I.F. and produce an AFC voltage added to -V to vary both the local oscillator frequency and the input circuit tuning. In Fig. 8, input is applied to the gate electrode of a neutralized amplifier, the gatedrain capacitance and the drain capacitance 180 in series forming one leg of a balanced bridge, with variable capacitor 188 and capacitor 190 forming the other leg. The neutralizing is unaffected by varying the tuning voltage -V 2 since the varies also the source-drain current and voltage across resistor 176 in series with the drain supply voltage V 1 , resulting in the gate-drain inherent capacitance becoming varied proportionately with the output capacitance 180. The circuits may form part of an FM receiver.
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