GB584606A - Improvements in arrangements for generating synchronous pulses and scanning voltages - Google Patents

Improvements in arrangements for generating synchronous pulses and scanning voltages

Info

Publication number
GB584606A
GB584606A GB1961143A GB1961143A GB584606A GB 584606 A GB584606 A GB 584606A GB 1961143 A GB1961143 A GB 1961143A GB 1961143 A GB1961143 A GB 1961143A GB 584606 A GB584606 A GB 584606A
Authority
GB
United Kingdom
Prior art keywords
resistance
valve
condenser
scanning
wave
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB1961143A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
International Standard Electric Corp
Original Assignee
International Standard Electric Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by International Standard Electric Corp filed Critical International Standard Electric Corp
Priority to GB1961143A priority Critical patent/GB584606A/en
Publication of GB584606A publication Critical patent/GB584606A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K4/00—Generating pulses having essentially a finite slope or stepped portions
    • H03K4/06—Generating pulses having essentially a finite slope or stepped portions having triangular shape
    • H03K4/08—Generating pulses having essentially a finite slope or stepped portions having triangular shape having sawtooth shape
    • H03K4/10—Generating pulses having essentially a finite slope or stepped portions having triangular shape having sawtooth shape using as active elements vacuum tubes only
    • H03K4/12—Generating pulses having essentially a finite slope or stepped portions having triangular shape having sawtooth shape using as active elements vacuum tubes only in which a sawtooth voltage is produced across a capacitor
    • H03K4/16—Generating pulses having essentially a finite slope or stepped portions having triangular shape having sawtooth shape using as active elements vacuum tubes only in which a sawtooth voltage is produced across a capacitor using a single tube with positive feedback through transformer, e.g. blocking oscillator

Abstract

584,606. Saw - tooth generators. STANDARD TELEPHONES & CABLES, Ltd. (International Standard Electric Corporation). Nov. 24,1943, No. 19611. [Class 40 (v)] A scanning wave and marking pulse, derived from a relaxation oscillator, are applied to an oscillograph, the shape of the scanning wave being variable without affecting the repetition frequency of the oscillator. The marking pulse is used as a reference point on the cathode-ray screen trace and may be employed to synchronize the transmitter in a radiolocation system. The blocking oscillator valve V1, Fig. 3, back coupled over transformer T1, generates a marking pulse across resistance 5 when the valve conducts. The flow of anode current charges condenser 10 which discharges slowly over resistance 11 to form the scanning wave until the valve VI conducts again. The frequency of oscillation, determined by the time constant of condenser 1 and resistance 2, is substantially unaffected by changes in condenser 10 and resistance 11. In a modification, Fig. 7 (not shown), the resistance 11 and condenser 10 are fed over a resistance from the output voltage developed across resistance 5, the remote end of the condenser 10 being connected to the anode of a diode, the cathode of which is earthed. For producing a scanning voltage shorter than the period of the blocking oscillator valve V1, Fig. 8, the voltage across condenser 1 is fed through an amplifier V3 to a valve V4 normally biassed beyond cut-off by a voltage supplied to potentiometer 29. Only the positive peaks are amplified in valve V4, the resulting negative-going wave being amplified by valve V5 to produce the positive-going scanning wave-form across the anode load. The grid resistance of valve V1 consists of a pentode V2. synchronizing pulses being applied to the grid,
GB1961143A 1943-11-24 1943-11-24 Improvements in arrangements for generating synchronous pulses and scanning voltages Expired GB584606A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1961143A GB584606A (en) 1943-11-24 1943-11-24 Improvements in arrangements for generating synchronous pulses and scanning voltages

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1961143A GB584606A (en) 1943-11-24 1943-11-24 Improvements in arrangements for generating synchronous pulses and scanning voltages

Publications (1)

Publication Number Publication Date
GB584606A true GB584606A (en) 1947-01-20

Family

ID=10132242

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1961143A Expired GB584606A (en) 1943-11-24 1943-11-24 Improvements in arrangements for generating synchronous pulses and scanning voltages

Country Status (1)

Country Link
GB (1) GB584606A (en)

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