Radio communication device

• US 8,699,639 B2
• Filed: 10/12/2011
• Issued: 04/15/2014
• Est. Priority Date: 10/19/2010
• Status: Active Grant

• Current Assignee: JVC Kenwood Corporation
• Original Assignee: JVC Kenwood Corporation
• Inventors: Tsuchida, Masayuki
• Primary Examiner(s): FILE, ERIN M
• Application Number:
  US13/317,175
• Publication Number:
  US 20120093202A1
• Time in Patent Office: 916 Days
• Field of Search: 375/344
• US Class Current: 375/344
• CPC Class Codes: H04B 1/38 Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving

Abstract

A signal generator outputs a signal whose frequency is uniquely decided by frequency data set therein. A control section can set first data in the frequency generator as frequency data. The control section can transition among an access unimplementing state, an access stand-by state, and an access implementing state. A signal processing section can set second data in the signal generator as frequency data. The signal processing section can transition between an access allowed state and an access inhibited state. The control section transfers, to the signal processing section, a signal indicative of a desire to transition to the access implementing state and a signal indicative of transition of the control section from the access implementing state. The signal processing section transfers, to the control section, a signal indicative of transition of the signal processing section between the access allowed state and the access inhibited state.

Claims

1. A radio communication device comprising:

a signal generator outputting a signal whose frequency is uniquely decided by frequency data set therein;

a control section outputting first data to the signal generator and setting the first data therein as frequency data, the control section being able to transition among an access unimplementing state where the control section does not access the signal generator, an access stand-by state where the control section waits for access to the signal generator, and an access implementing state where the control section accesses the signal generator; and

a signal processing section outputting second data to the signal generator and setting the second data therein as frequency data for increasing or decreasing the frequency of the signal outputted by the signal generator, the signal processing section being able to transition between an access allowed state where the signal processing section is allowed to access the signal generator and an access inhibited state where the signal processing section is inhibited from accessing the signal generator;

wherein the signal generator comprises a PLL circuit whose control object is a voltage controlled oscillator;

wherein the first data and the second data are subjected to OR operation by a logical adder to form setting data of a frequency division ratio in a frequency divider in the PLL circuit, and each of the first data and the second data comprises at least one of a data signal, an address signal, a control signal, and a clock signal;

wherein during a transmission mode of operation of the radio communication device, the second data is data for increasing or decreasing the frequency of the signal outputted by the signal generator to implement modulation via the signal processing section;

wherein during a reception mode of operation of the radio communication device, the second data is data for increasing or decreasing the frequency of the signal outputted by the signal generator to implement automatic frequency control via the signal processing section;

wherein the control section transfers, to the signal processing section, a first signal indicative of a desire to transition to the access implementing state to start outputting the first data to the frequency divider and indicative of transition of the control section from the access implementing state to end outputting the first data to the frequency divider; and

wherein the signal processing section transfers, to the control section, a second signal controlling the outputting of the first data from the control section to the frequency divider and being indicative of transition of the signal processing section between the access allowed state and the access inhibited state.

2. A radio communication device as recited in claim 1, wherein the first signal and the second signal transferred between the control section and the signal processing section travel along a data communication line or a control port.

3. A radio communication device as recited in claim 1, wherein when the control section transfers, to the signal processing section, the first signal indicative of the desire to transition to the access implementing state, the control section commands the signal processing section to reset a frequency division ratio in the signal generator and restricts the automatic frequency control implemented via the signal processing section.