GB1303631A - - Google Patents

Info

Publication number
GB1303631A
GB1303631A GB1303631DA GB1303631A GB 1303631 A GB1303631 A GB 1303631A GB 1303631D A GB1303631D A GB 1303631DA GB 1303631 A GB1303631 A GB 1303631A
Authority
GB
United Kingdom
Prior art keywords
frequency
variable
divider
division
output
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
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 filed Critical
Publication of GB1303631A publication Critical patent/GB1303631A/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01L—CHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE
    • B01L3/00—Containers or dishes for laboratory use, e.g. laboratory glassware; Droppers
    • B01L3/50—Containers for the purpose of retaining a material to be analysed, e.g. test tubes
    • B01L3/502—Containers for the purpose of retaining a material to be analysed, e.g. test tubes with fluid transport, e.g. in multi-compartment structures
    • B01L3/5027—Containers for the purpose of retaining a material to be analysed, e.g. test tubes with fluid transport, e.g. in multi-compartment structures by integrated microfluidic structures, i.e. dimensions of channels and chambers are such that surface tension forces are important, e.g. lab-on-a-chip
    • B01L3/502707—Containers for the purpose of retaining a material to be analysed, e.g. test tubes with fluid transport, e.g. in multi-compartment structures by integrated microfluidic structures, i.e. dimensions of channels and chambers are such that surface tension forces are important, e.g. lab-on-a-chip characterised by the manufacture of the container or its components
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03L—AUTOMATIC CONTROL, STARTING, SYNCHRONISATION, OR STABILISATION OF GENERATORS OF ELECTRONIC OSCILLATIONS OR PULSES
    • H03L7/00—Automatic control of frequency or phase; Synchronisation
    • H03L7/06—Automatic control of frequency or phase; Synchronisation using a reference signal applied to a frequency- or phase-locked loop
    • H03L7/16—Indirect frequency synthesis, i.e. generating a desired one of a number of predetermined frequencies using a frequency- or phase-locked loop
    • H03L7/22—Indirect frequency synthesis, i.e. generating a desired one of a number of predetermined frequencies using a frequency- or phase-locked loop using more than one loop
    • H03L7/23—Indirect frequency synthesis, i.e. generating a desired one of a number of predetermined frequencies using a frequency- or phase-locked loop using more than one loop with pulse counters or frequency dividers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01L—CHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE
    • B01L2300/00—Additional constructional details
    • B01L2300/06—Auxiliary integrated devices, integrated components
    • B01L2300/0627—Sensor or part of a sensor is integrated
    • B01L2300/0645—Electrodes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01L—CHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE
    • B01L2300/00—Additional constructional details
    • B01L2300/08—Geometry, shape and general structure
    • B01L2300/0809—Geometry, shape and general structure rectangular shaped
    • B01L2300/0816—Cards, e.g. flat sample carriers usually with flow in two horizontal directions

Abstract

1303631 Frequency synthesis RACAL INSTRUMENTS Ltd 2 March 1970 [1 March 1969] 11029/69 Heading H3A A frequency synthesizer comprises a variable frequency generator 18 producing an output frequency Fo dependent on a control frequency Fr and a variable frequency divider 20, the frequency Fr being varied as a function of the division factor N 1 of divider 20. The synthesizer may comprise a first synthesizing frequency Fp obtained by a phase comparision of a reference frequency F derived from source 31 of Mc/s. with a signal obtained from a controlled oscillator 36 via a variable divider 40 having a division ratio N 2 . The signal Fp is further divided by a variable division factor N 1 to obtain an intermediate signal Fu which is added to a reference frequency Fs at 30 to obtain a second synthesizing frequency Fc which after a fixed division by n/p at 28 becomes the control frequency Fr. The dividers 20 and 38 may be gauged electrically or mechanically. Adjustment of variable division ratios N 1 causes the output frequency to vary in steps of n c/s. and variation of N 2 causes output to vary in steps of p c/s. A fixed divider may follow the variable divider 38. Figs. 2 and 3 (not shown) indicate arrangements for extending the range of output frequencies.
GB1303631D 1969-03-01 1969-03-01 Expired GB1303631A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1102969 1969-03-01

Publications (1)

Publication Number Publication Date
GB1303631A true GB1303631A (en) 1973-01-17

Family

ID=9978750

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1303631D Expired GB1303631A (en) 1969-03-01 1969-03-01

Country Status (1)

Country Link
GB (1) GB1303631A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2736133A1 (en) * 1977-08-11 1979-02-15 Rohde & Schwarz Simple standard frequency generator - has oscillator tuned to harmonic of synthesiser whose reference frequency output is set incrementally by microprocessor
GB2188201A (en) * 1986-03-18 1987-09-23 Int Mobile Machines Frequency synthesizer for broadcast telephone system

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2736133A1 (en) * 1977-08-11 1979-02-15 Rohde & Schwarz Simple standard frequency generator - has oscillator tuned to harmonic of synthesiser whose reference frequency output is set incrementally by microprocessor
GB2188201A (en) * 1986-03-18 1987-09-23 Int Mobile Machines Frequency synthesizer for broadcast telephone system
FR2597684A1 (en) * 1986-03-18 1987-10-23 Int Mobile Machines FREQUENCY SYNTHESIZER FOR RADIOTELEPHONE SYSTEM COMPRISING MULTIPLE CHANNELS TO WHICH FREQUENCIES MAY BE AFFECTED.
GB2188201B (en) * 1986-03-18 1989-12-06 Int Mobile Machines Frequency synthesizer for broadcast telephone system having multiple assignable frequency channels

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Legal Events

Date Code Title Description
PS Patent sealed
PE20 Patent expired after termination of 20 years