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• ### Digital methods of measurement

Publication Year: 1969
| | PDF (133 KB)

First Page of the Article
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• ### Future trends in television broadcast engineering

Publication Year: 1969, Page(s):323 - 328
| | PDF (725 KB)

Future engineering objectives for each of the parts of the transmission chain are forecast. they include smaller cameras with higher sensitivity (possibly using solid-state sensors), flying-spot film scanners operating on both the 625/50 and 525/60 standards, automated signal switching systems, improved recording systems using high-density magnetic and laser techniques, the use of p.c.m. for telev... View full abstract»

• ### Television receiversߞa survey of current design trends

Publication Year: 1969, Page(s):329 - 336
| | PDF (1015 KB)

The main features of domestic monochrome and colour receivers are surveyed, particularly with respect to the larger screen size. Circuit technology has reached the stage at which integrated circuits are starting to challenge the transistor while in certain applications the valve still has a major advantage, mainly due to the scanning power required by the picture tube. View full abstract»

• ### Joint conference on digital methods of measurementÂ¿

Publication Year: 1969, Page(s):337 - 338
| PDF (171 KB)
• ### An introduction to threshold logic: a survey of present theory and practice

Publication Year: 1969, Page(s):339 - 351
Cited by:  Papers (6)
| | PDF (1504 KB)

The familiar logic building blocks of AND, OR, NAND, and NOR functions are practical realizations of well-known basic boolean algebraic connectives, and as such enable any two-state logic system to be constructed. however, a more powerful basic logic building block than boolean gates is the threshold gateÂ¿. such a gate has binary inputs A, B, C,Â¿, with `weightsÂ¿ a, b, c,Â¿associated with these... View full abstract»

• ### Cross-modulation and intermodulation distortions in the tuned square-law diode frequency converter

Publication Year: 1969, Page(s):353 - 363
Cited by:  Papers (1)
| | PDF (903 KB)

Diodes possessing very accurate square-law I/V characteristics have recently been developed. An analytical technique is set out in this paper for the evaluation of cross-modulation and intermodulation distortions in a tuned frequency-converter using such diodes. The theory is used to predict the distortions obtained under practical conditions and it is shown that, where limited local-oscillator po... View full abstract»

• ### A radiometer for measurement of the noise temperature of low-noise microwave amplifiers

Publication Year: 1969, Page(s):365 - 373
| | PDF (1370 KB)

The noise temperature of a low-noise microwave amplifier can be measured by connecting the amplifier input in turn to thermal noise sources at different physical temperatures. The conventional technique is limited by the necessity for a very stable amplifier and system gain during the measurements. The paper describes a manually-balanced radiometer circuit designed to overcome this limitation, and... View full abstract»

• ### A pulse generator using R.T.L. integrated circuits

Publication Year: 1969, Page(s):374 - 376
| | PDF (366 KB)

A three-channel pulse generator is described which uses r.t.l. integrated circuits as the sole active devices. Each output pulse has a width variable from 100 ns to 1 Â¿s and may be delayed by up to 2 Â¿s with respect to either a fixed synchronization pulse or an external trigger. The circuit as a whole demonstrates the flexibility of some digital integrated circuits in non-digital applications. View full abstract»

• ### On the generation of a standard computer/peripheral interface

Publication Year: 1969, Page(s):377 - 384
| | PDF (811 KB)

The buffer unit forming the interface comprises two distinct sets of logic circuits: computer interrupt equipment and peripheral control unit. Information transfers across the interface are over a bidirectional bussed highway up to 25 bits wide. Eight unidirectional lines control computer to peripheral connexions. Transfer times range from 1 to 5 Â¿s View full abstract»