Communication systems consist of an input device, transmitter, transmission medium,
receiver and output device, as shown in Fig. 1.1. The input device may be a computer,
sensor or oscillator, depending on the application of the system, while the output device
could be a speaker or computer. Irrespective of whether a data communications or
telecommunications system is used, these elements are necessary.
Lecture "Radio Communication Circuits: Chapter 5&6" presents the following contents: RF Filters, Oscillators and Frequency Synthesizers (RF Oscilators, Voltage-Controlled Oscillators (VCO); Phase-Locked Loops (PLLs) and Applications). Invite you to consult.
The operational amplifier (Op Amp) is one of the versatile electronic circuits. It can be used to perform the basic mathematical operations: addition, subtraction, multiplication, and division. They can also be used to do integration and differentiation. There are several electronic circuits that use an op amp as an integral element. Some of these circuits are amplifiers, filters, oscillators, and flip-flops. In this chapter, the basic properties of op amps will be discussed.
While this book was being written, digital sound synthesis reached something of a milestone—its
50th birthday. Set against the leisurely pace of the development and evolution of acoustic musical
instruments in previous years, a half century is not a long time. But given the rate at which
computational power has increased in the past decades, it is fair to say that digital sound is, if
not old, at least enjoying a robust middle age.
For a complete data sheet, please also download:
• The IC04 LOCMOS HE4000B Logic Family Specifications HEF, HEC • The IC04 LOCMOS HE4000B Logic Package Outlines/Information HEF, HEC
Product speciﬁcation File under Integrated Circuits, IC04 January 1995
14-stage ripple-carry binary counter/divider and oscillator
DESCRIPTION The HEF4060B is a 14-stage ripple-carry binary counter/divider and oscillator with three oscillator terminals (RS, RTC and CTC), ten buffered outputs (O3 to O9 and O11 to O13) and an ...
DS3 Network Elements (NE) such as fiber optic terminals (FOT) or M13 multiplexers (M13) that
are cabled to the DSX-3 require a 75 ohm load to stabilize the output signal. This 75 ohm load
or "75 ohm termination" prevents the output from oscillating and affecting adjacent channels.
When a NE is cross-connected to another NE, the output of each NE is terminated by the input
of the other NE.
When multiple NEs are installed, many are often unassigned for a period of time until working
service is required.
A communication circuit designer frequently requires means to select (or reject) a band of frequencies from a wide signal spectrum. Resonant circuits provide such ®ltering. There are well-developed, sophisticated methodologies to meet virtually any speci®cation. However, a simple circuit suf®ces in many cases. Further, resonant circuits are an integral part of the frequency-selective ampli®er as well as of the oscillator designs. These networks are also used for impedance transformation and matching.
Oscillator circuits are used for generating the periodic signals that are needed in various applications. These circuits convert a part of dc power into the periodic output and do not require a periodic signal as input. This chapter begins with the basic principle of sinusoidal oscillator circuits. Several transistor circuits are subsequently analyzed in order to establish their design procedures.
CHAPTER ELEVEN OPERATIONAL AMPLIFIERS The operational amplifier (Op Amp) is one of the versatile electronic circuits. It can be used to perform the basic mathematical operations: addition, subtraction, multiplication, and division. They can also be used to do integration and differentiation. There are several electronic circuits that use an op amp as an integral element. Some of these circuits are amplifiers, filters, oscillators, and flip-flops. In this chapter, the basic properties of op amps will be discussed.